LevelPart
We pay for small Roblox games' ads.
Chapter 01 / 06
Roblox is a country of 138 million people.
Every day, 138 million people play on Roblox. Together they spend nearly 34 billion hours there each quarter. On the stock market, the company is worth $35.7 billion.
138 M
players a day (Q3 2026)
35.7
$B market cap (Nov 13, 2026)
Roblox market cap, in billions of dollars
Sources: Roblox SEC filings · stockanalysis.com
Chapter 02 / 06
And that country pays its creators.
In 2025, Roblox paid $1.5 billion to developers. That's 13 times more than in 2019. But the money is very unevenly spread.
1,500
$ a year: the median
65.7
$M a year: top 10 average
Money paid to creators per year, in millions of dollars
Sources: Roblox SEC filings · Roblox newsroom, 2026-09-03
Chapter 03 / 06
Soon, anyone can make a game.
The computing power of the biggest AIs grows 5 times every year. On Roblox, typing one sentence already makes a playable game: with Build, over 70,000 games were published in one quarter.
+70,000
games published with Build in Q3 2026
- 2023 Assistant in Studio
- 2025 Cube 3D: text to object
- 2026 4D generation
- 2026 Build: one sentence, one game
Compute of the largest known AI training run, in operations (log scale)
Sources: Epoch AI · Roblox Q3 2026 letter
Chapter 04 / 06
The real problem: being seen.
7 million games are played every day. Yet only 50 games take half of all the hours played. A good game nobody sees earns nothing.
Share of hours played, December 2025
Sources: Roblox SEC filings
Chapter 05 / 06
Roblox ads exist for this.
In Ads Manager, you set a budget and Roblox puts your game on the home page and in search. Over 70% of the 100 top-earning games run ads.
Budget
$50
paid by card
“Plays” goal
≈ 6,850
plays, at $0.0073 each
“New users” goal
≈ 2,670
new players, at $0.0187 each
Platform averages as of Nov 11, 2025: a ballpark, not a promise.
Sources: Roblox DevForum, 2025-11-20 · Roblox Q3 2026 letter · Roblox DevForum, RDC 2026
Chapter 06 / 06
What a Robux is worth, from player to dev.
A player pays about $10 for 1,000 Robux. If they spend them in your game, you get 700. At the DevEx rate, that's $2.66 in your account.
The player buys
$10
for 1,000 Robux
You get
700
Robux (70%)
You cash out
$2.66
at the $0.0038 DevEx rate
Cash-out starts at 30,000 Robux earned, i.e. $114.
Sources: Roblox DevEx docs · Roblox SEC filings
So the question isn't “is my game good”. It's “how much does a player I pay to bring in earn me”. That's what we measure.
Free test · 10 places · until January 31
We pay for your Roblox game's ads.
€50 of Roblox ads on your game for one week. In return, you show us your stats before and after. That's it.
- of Roblox ads, free
- €50
- of Roblox ads, free
- of campaign
- 7 days
- of campaign
- places in the first round
- 10
- places in the first round
Who it's for
A published game
Your game is live and playable on Roblox.
$300 to $800 a month
It already earns a bit. Enough to measure, not yet enough to pay for ads.
18 or older
You, or your registered studio. No accounts run by minors.
How it works
- 01
You sign up your game
Your game link and a way to reach you. Two minutes.
- 02
We pick 10 studios
We reply within a few days, yes or no.
- 03
You open ads to us
In your Roblox group, you give us the right to create ad campaigns. Never your password, never your Robux.
- 04
The ads run for a week
We pay €50 out of our own pocket. You send us your stats before and after.
The report you get
One page, your numbers, what they mean. The same format for all 10 studios.
- Cost per new player
- Day 1 and day 7 retention
- Share of payers
- Robux per new player
Sample game · obby
Test from Dec 2 to Dec 9
Robux per new player
3,1
The number that tells you if your ads can pay for themselves.
- Cost per new player
- $0.019
- New players
- 2,640
- Share of payers
- 3.1%
- Robux earned during the test
- 8,200
Retention
In one week, the new players brought back 62% of what the ads cost.
How we pick
We don't take everyone. We want 10 games where the test will really tell us something.
60
studios contacted
10
tested
2 or 3
get a Boost next
- The game is finished and playable
- It already earns money
- Players come back
- The game page makes you want to play
- The studio replies fast
- There's room in its genre
Simulate a Boost
After the test, if your ads pay off: we fund more ads, and you give back a share of the extra revenue. Never more than the cap.
- Your share back
- 20% of revenue above your baseline
- Cap
- €450
1.5 × the stake, and 3 months at most. If the game earns nothing extra, you owe us nothing.
Sign up your game
10 places for the first round. We read every sign-up.
Questions
Why is it free?
We're learning to measure what a new player is worth. Your numbers help us build the method. We only keep aggregated numbers.
Do you touch my Robux or my account?
No. We pay for the ads with our card. You only give us the right to create campaigns in your group, and you can remove it whenever you want.
Will you publish my results?
Only with your written OK. Otherwise the report stays between us.
Who are you?
Two students in France who also make Roblox games. LevelPart is our project, and this test is the first thing we offer.