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![TheMattBerman Avatar](https://lunarcrush.com/gi/w:24/cr:twitter::248742423.png) Matthew Berman [@TheMattBerman](/creator/twitter/TheMattBerman) on x 2988 followers
Created: 2025-07-18 17:06:48 UTC

2/ Case Study #1: Tony Dinh (@tdinh_me)

Built TypingMind: A ChatGPT UI wrapper.
Revenue: $170K/month (Apr 2025) from one-time upgrades.

The genius move?
Started XXX% free (bring your own API key) → viral X threads hit 100K+ users → natural $39-$199 upgrades for advanced features.



XX engagements

![Engagements Line Chart](https://lunarcrush.com/gi/w:600/p:tweet::1946255343572459968/c:line.svg)

**Related Topics**
[$170kmonth](/topic/$170kmonth)
[open ai](/topic/open-ai)

[Post Link](https://x.com/TheMattBerman/status/1946255343572459968)