DuckMath

Unblocked browser games website monetized via Google AdSense ads

duckmath.org Founded 2021 By Maddox Schmidtoffer
MRR $15k
Users 1.5M
Stage Growing
Category Consumer SaaS
Starter Story I Make $15K/Month From One Website
Growth roadmap

9 moves, in order

  1. Pre launch / Year 1
    Google sites embed

    Built the first version of the site on Google Sites using drag-and-drop, embedding free online games via iframes. No custom code, no design — purely functional.

    A few thousand users over time, negligible revenue
  2. Early passive phase (Years 1–3)
    TikTok — organic

    Posted TikTok videos sporadically, roughly once a day or less, 5 days a week. No structured format, no iteration. Site sat largely dormant while generating small passive AdSense income.

    $240 in a single day eventually observed — first major revenue signal
    MRR $1.0k
  3. Growth phase kickoff
    TikTok — organic

    After the $240 day, Maddox studied 10–20 competitor TikTok videos to identify top-performing hooks and formats. He then copied the best formats, posting 3 videos/day across 3 TikTok accounts (9 videos/day total), 5 days a week.

    Rapid spike in daily active users; AdSense revenue graph shows sharp inflection
  4. Growth phase — cross platform automation
    Instagram reels youtube shorts snapchat

    Used Repurpose.io to automatically cross-post every TikTok video to Instagram Reels, YouTube Shorts, and Snapchat — zero additional effort. Snapchat consistently delivered 20,000+ views per video.

    One video: 2.1M views on TikTok, 3.2M on Instagram, ~5M total across platforms. Estimated ~$1,000 revenue from a single video.
  5. Growth phase — content iteration system
    TikTok — organic

    After each batch of videos, reviewed engagement rates and outcomes before filming the next day's videos. Iterated on hooks and formats each cycle. Found a winning visual hook format (filming laptop gameplay on phone) and ran it as a series of 30+ parts with varied hooks.

    4.6M total views on main TikTok account
  6. Growth phase — delegation
    Creator delegation

    Mentored another person to produce videos following his exact format, paying his girlfriend ~$200/week to post roughly one video per week. This freed Maddox to focus on site improvements and AB testing rather than daily content production.

    Maintained high content volume without founder bottleneck
  7. Monetization optimization
    Ab testing onsite

    Used PostHog (obtained $50K in credits via their startup program) to AB test site layout and navigation, maximizing both session time and pages-per-visit. More pages = more ad impressions = more AdSense revenue.

    Helped scale AdSense revenue; contributed to reaching $15K/month peak
    MRR $15k Users 150k users
  8. Community building
    Discord community

    Built a Discord server that grew to 7,000 members. Used it to hype new features and maintain an engaged user community around the site.

    7,000 Discord members; improved retention and feature feedback loop
  9. Exit
    Direct outreach to acquirer

    Recalled seeing a larger company acquire a similar small games site ~1 year prior. Proactively contacted them with his stats. Received a $100K lowball offer, countered, and agreed on a final price. Used Escrow.com as middleman for the transfer.

    Sold for $120,000
First 100 users

Maddox saw a younger kid on TikTok promoting a similar unblocked games site and copying that exact model — he built a basic version on Google Sites using embedded games and started posting on TikTok daily, 5 days a week. Initial results were minimal: the posts got some views but never broke through. After about two years of low-effort maintenance, the site was passively generating occasional small revenue with a few thousand users, but no significant traction. The first real signal came when — without any specific campaign — the site made $240 in a single day purely from passive traffic. This became the inflection point that motivated Maddox to take marketing seriously and look at what was actually working.

Unfair advantage

College student with a basic React dev background and internship experience, plus early awareness of the unblocked games niche from TikTok. Had a mentee he could delegate video creation to, and a girlfriend he paid $200/week to help post content. No major pre-existing audience — growth was largely earned through volume and iteration.

Scaling channel

tiktok_short_form_video

What didn't work

Sporadic early TikTok posting (once a day or less) for the first two years produced negligible results. Maddox also mentions he had explored B2B-type businesses ("ego businesses") which didn't pan out, though he doesn't give specifics on those.

Watch the original

I Make $15K/Month From One Website

Starter Story