Every GitHub developer becomes a building in a 3D city.
Vibe code a 3D game world with Claude and sell ads inside it: 66K users, $953
A fun thing people share on their own can become an ad space; brands came to him.
Figures as shared by the creator · source
From @SupermarketKey1196 on Reddit · Mar 2026
The Short Version
- What: A solo developer vibe coded a 3D city where every GitHub user is a building, writing it with Claude (21,000 lines at first, 176 commits later).
- Result: In 29 days he reported 66,272 developers in the city, 120,733 unique visitors, 4,238 GitHub stars, 40+ advertising brands, 2.2M ad impressions at about 1% CTR, $953 in total revenue and $96 MRR from three ad subscriptions, all with $0 spent on marketing (Reddit, r/vibecoding, Mar 2026).
- Made with: Claude
The workflow
Made With
Where & With What
What They Did
- 1The moveA solo developer vibe coded a 3D city where every GitHub user is a building, writing it with Claude (21,000 lines at first, 176 commits later).
- 2Step 2Build something people want to share
- 3Step 3Let the audience grow first
- 4ResultIn 29 days he reported 66,272 developers in the city, 120,733 unique visitors, 4,238 GitHub stars, 40+ advertising brands, 2.2M ad impressions at about 1% CTR, $953 in total revenue and $96 MRR from three ad subscriptions, all with $0 spent on marketing (Reddit, r/vibecoding, Mar 2026).
Quick Answers
What tools do you need?
Claude (anthropic's ai assistant for writing, products and building small tools).
How much does it cost?
You can start for $0: Claude has a free plan. Check each tool's site for current prices.
Is it allowed?
Follow the platform rules and disclose ads.
Watch out: Self-reported. Revenue is still small next to the traffic.
Try It Yourself
(Our template, not the creator's prompt.) Design 3 ad formats for a small browser game with 50K players that do not annoy them, with a price for each and how I will report impressions and clicks to advertisers.
Starter tools
Your first step
Open Claude, paste the prompt above and swap the [brackets] for your own niche.
Full write-up & sources
More detail: Claude also built a PvP raid system, missions, XP levels, Stripe payments and a VS Code extension. When brands asked to advertise, he added planes, blimps, billboards and sponsored landmark buildings.
Source: @SupermarketKey1196 on Reddit · Mar 2026. Summarised in our own words; figures as shared by the creator or shown on the platform. Updated .
