Every Steam Workshop listing has the same two fields at the top: a name, and a picture. The name is mandatory. The picture is not.
Using ModSignal's live dataset of 6.02 million active Workshop items carrying at least one subscription, we split the catalog by whether it shows a preview image at all, and measured what each half actually earns.
The result is the sharpest divide we have found in this dataset. A thumbnail is not a nice-to-have on the Steam Workshop. It is very nearly the whole ballgame.
The one-image cliff
| Preview image | Mods | Share of catalog | Avg subscriptions | Median subscriptions | Share of all subscriptions |
|---|---|---|---|---|---|
| Shown | 3,806,807 | 63.3% | 3,281 | 134 | 99.4% |
| Missing | 2,205,351 | 36.7% | 32 | 3 | 0.6% |
2,205,351 active mods — 36.7% of everything subscribed on the Workshop — display nothing but a grey placeholder. They average 32 subscriptions each, against 3,281 for mods that show an image. That is a 102x gap in average demand, and it is not a rounding artifact: the medians move the same way (134 vs 3).
Zoom out to the platform total and the split becomes lopsided to the point of absurdity. The 63.3% of mods that show a thumbnail hold 12.49 billion of the Workshop's 12.56 billion subscriptions — 99.4%. Every mod with no image, combined, holds 0.6%. The entire image-less third of the Workshop is a rounding error against the two-thirds that has one.
It isn't only the image — but the image is the gate
The fair objection is that a missing thumbnail never travels alone. It is the visible symptom of a listing that was never presented to anyone, and it co-occurs almost perfectly with a missing description.
Crossing the two fields over the same 6.02 million active, subscribed mods:
| Preview | Description | Mods | Share of catalog | Avg subs | Reached 1,000 subs | Reached 100,000 subs | Share of all subs |
|---|---|---|---|---|---|---|---|
| ✅ | ✅ | 3,306,075 | 55.0% | 3,537 | 775,844 (23.5%) | 15,524 | 93.6% |
| ✅ | ❌ | 500,732 | 8.3% | 1,590 | 79,609 (15.9%) | 793 | 6.4% |
| ❌ | ✅ | 64,116 | 1.1% | 357 | 2,654 (4.1%) | 15 | 0.18% |
| ❌ | ❌ | 2,141,235 | 35.6% | 23 | 392 (0.02%) | 45 | 0.39% |
Read the table as two separate levers.
The description is worth having. A mod with a preview and a description averages 3,537 subscriptions; one with a preview and no description averages 1,590. That is a 2.2x gap from words alone.
The image is worth more, and it is harder to fake. A mod with a thumbnail but no description averages 1,590. A mod with a description but no thumbnail averages 357 — 22% of the value of the reverse case. Writing real prose about a mod nobody can see is worth about a fifth of showing a picture without saying anything.
And then the bottom-right cell: 2,141,235 mods with neither a preview nor a description average 23 subscriptions each. Only 392 of them have ever reached 1,000 subscribers — 0.02%. That quadrant is 35.6% of the active, subscribed catalog — well over a third of everything on the Workshop is a title with nothing behind it.
Widen the lens to the full active catalog and the pattern is even starker. There are 1,317,408 active mods carrying zero subscriptions. 1,316,207 of them — 99.91% — have neither a preview image nor a description. The empty listing and the zero-install listing are, for practical purposes, the same population.
At the top, a missing image is nearly extinct
The divide is not a matter of degree among mods that matter. It is a boundary.
Slicing the active, subscribed catalog into percentiles by subscription count and measuring thumbnail presence in each:
| Percentile by subscriptions | Avg subs in band | Show a preview image |
|---|---|---|
| Top 1% | 127,768 | 99.8% |
| Top 5% | 6,322 | 99.7% |
| Top 10% | 2,130 | 99.6% |
| Top 25% | 282 | 98.5% |
| 50th percentile | 30 | 97.2% |
| 51st percentile | — | 97.1% |
| 51st–75th | 4 | 0.12% |
| Bottom 25% | 1 | 0.00% |
The transition is a cliff, not a slope. At the median and above, 97.1% to 99.8% of mods show an image. Immediately below it, one in a thousand does. A thumbnail is effectively a prerequisite for being in the top half of the Steam Workshop at all — and its absence is a near-certain marker of the bottom half.
The top of the ladder is the most emphatic. Of the 1,000 most-subscribed active mods on the platform, 989 display a preview image — 98.9%. The 11 that do not share a single origin: every one is an Aimlabs aim-trainer routine, led by Custom_rA100hz at 5,853,129 subscriptions, Custom_VoltaicZapper at 4,278,811 and Custom_VTnoADS at 3,901,945.
That is the exception that proves the rule. Aimlabs configs are distributed as share codes inside the game client, not by browsing the Workshop — a player imports a code and the item installs itself. The Workshop page is not the acquisition channel, so the page's storefront quality costs nothing. (This is the same structural escape the blank-page analysis found: on Wallpaper Engine, the image is the product.)
Where the image is optional — and where it is everything
The gap between "has a thumbnail" and "has none" varies enormously between ecosystems, and the variance is informative:
| Game | Mods | Share with a preview | Avg subs, no preview | Avg subs, with preview | Multiple |
|---|---|---|---|---|---|
| Cities: Skylines | 161,226 | 78.4% | 3.1 | 6,237.9 | 1,987x |
| People Playground | 89,896 | 34.3% | 2.4 | 4,651.4 | 1,899x |
| DayZ | 97,145 | 58.2% | 3.3 | 5,414.2 | 1,666x |
| Unturned | 73,934 | 38.7% | 3.2 | 3,144.0 | 993x |
| Garry's Mod | 176,616 | 98.6% | 12.4 | 9,050.9 | 728x |
| Left 4 Dead 2 | 176,354 | 96.3% | 5.1 | 3,342.0 | 652x |
| Terraria | 101,286 | 23.9% | 22.8 | 2,508.8 | 110x |
| Trailmakers | 331,276 | 75.4% | 5.7 | 103.3 | 18x |
| Aimlabs | 83,227 | 39.1% | 816.7 | 10,377.5 | 13x |
| Wallpaper Engine | 105,444 | 100.0% | — | 18,265.2 | — |
Three things stand out.
In most ecosystems, an image-less mod is a dead mod. Cities: Skylines is the extreme: its 21.6% of mods without a preview average 3.1 subscriptions, while its image-bearing majority averages 6,237.9 — a 1,987x separation. People Playground, DayZ and Unturned all run near 1,000x. If your mod has no picture in one of these games, it is not competing at a disadvantage; it is not competing.
Wallpaper Engine has no divide at all, because it eliminated one side of it. Of its 105,444 active subscribed mods, 105,442 carry a preview image — 100.0%. Its two image-less items are too few to produce a meaningful average, which is itself the finding: in an ecosystem where the listing is a visual product, essentially nobody publishes without an image. Compare Terraria at 23.9% and People Playground at 34.3% — two huge catalogs that are mostly published-but-unpresented items.
A tiny image-less population can still be large in absolute terms. Trailmakers has the largest catalog on this list (331,276 mods) and the highest count of image-less mods (81,590). Yet its image-less mods average 103 subscriptions — 3x the platform-wide image-less average of 32 — and its multiple is only 18x. Where a game's baseline is high, even an unillustrated listing catches residual traffic. The divide is real everywhere; its slope depends on the ecosystem's floor.
The two-minute fix with a 102x payoff
Strip the causality caveats and the actionable finding is unusually direct.
- If your mod has no preview image, that is the single highest-leverage change available to you. It costs one upload. The population that has done it averages 102x the demand of the population that hasn't, and it is the only listing attribute in this dataset that is 97%+ universal among the top half of the Workshop and 0.1% present in the bottom half.
- A description is the second lever, not the first. Adding words to an imageless listing gets you to 357 average subscriptions. Adding an image to a wordless listing gets you to 1,590 — and the image is what makes every later description change legible.
- Treat the bottom-right quadrant as a different problem. 2.14 million mods have neither a preview nor a description and average 23 subscriptions. For a creator already there, the gap is not "optimize your listing" — it is that the mod was published and never presented. Either finishing the storefront, or accepting that the Workshop is not the distribution channel (as it isn't for Aimlabs), are the only two coherent answers.
- For studios, thumbnail coverage is a free ecosystem-health metric. Garry's Mod (98.6%), Left 4 Dead 2 (96.3%) and Wallpaper Engine (100%) have essentially complete coverage. Terraria is at 23.9% and People Playground at 34.3%, despite enormous catalogs — those ecosystems are full of published-but-unpresented items that will never be found.
How we measure
All figures come from the ModSignal live dataset of the Steam Workshop, taken from the 2026-09-23 snapshot. The base population for every ratio table is 6,012,158 active workshop_items carrying at least one current subscription, out of 7,329,566 active items across 396 tracked games. "Has a preview image" means the item's preview_url is a non-empty value; "has a description" means description_short is non-empty. Percentile bands use ntile(100) over subscription count within the same base population, so band 50 and band 51 sit immediately either side of the median. The zero-subscription figures are measured over the full active catalog rather than the subscribed base. Subscription totals cover the platform's 12,560,490,253 current subscriptions.
This is the data ModSignal tracks daily to spot breakout creators and fading ecosystems before the leaderboards move. Explore the live dataset to see which games your thumbnail strategy has to compete in, or compare two ecosystems directly.