Built a game site generating $15,000/month and sold it for $120,000, increasing the initial offer of $100,000 through negotiation.
Link to this point #1Starter Story
I Make $15K/Month From One Website
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Overview
The case of college student Maddox Schmidtoffer, who built the game website duckmath.org, generating $15,000 per month, and eventually sold it for $120,000. He grew a site that had been dormant for 4 years from 5 to 150,000 daily active users in 4 months through a high-volume posting strategy on TikTok. The core of the business lay in its Google AdSense advertising revenue model and short-form video marketing, which researched and mimicked competitors' successful formats.
Key points
A site left dormant for 4 years started serious marketing after one day recording $240 in revenue.
Link to this point #2Posted 3 times a day, 5 days a week on 3 TikTok accounts, cross-posted to Instagram, YouTube Shorts, and Snapchat. Snapchat alone consistently generated over 20,000 views.
Link to this point #3Researched competitors' successful videos and posted at twice their volume. The most popular video recorded 5 million views, generating an estimated $1,000 in revenue.
Link to this point #4Earned approximately 1 cent per user from 1.5 million monthly users via Google AdSense. Peak daily earnings were $600-$700.
Link to this point #5Tech Stack: Cloudflare (hosting/domains), Supabase (backend/authentication), PostHog (AB testing), Repurpose.io (automated video cross-posting).
Link to this point #6Initially built with drag & drop on Google Sites, later migrated to React. AI (Vibe coding) was utilized to reduce coding time.
Link to this point #7The secret to success was 'consistency'. He continued posting daily on TikTok for 4 years, analyzing and improving engagement for each video.
Link to this point #8Instead of an 'ego business' (a serious B2B business valued by peers), one should pursue a 'real business' that actually generates revenue.
Link to this point #92026 Strategy: Pick a niche, build an MVP in 2-3 days, analyze 10-20 of competitors' successful videos, post daily on TikTok, and iterate for improvement.
Link to this point #10Put this knowledge to work.
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