I put an early GenAI side project up, someone convinced me to monetize, and boom - $700k ARR in almost no time.
I'm not sure it's possible now with so little effort given how full the space is, but if you're in the right time and place with the right solution, there are tons of people that will pay you.
Same story as always: create value, solve a problem, make something people want.
Projected, or has it been operating for a year?
I'm about to open source our desktop AI VFX compositing and animation tools:
https://www.youtube.com/watch?v=tAAiiKteM-U
https://getartcraft.com/ (github and download links are not live yet)
I'm an engineer and a filmmaker. I'm really into video generation, but controllability and consistency are critical. I've been working on staging, blocking, and animation tools to control how various commercial and open source models behave.
I just didn't have a passion for TTS and voice conversion.
The Uberduck folks were my closest competitors for a while and they were YC funded. I think Suno and Udio sunk their product roadmap for music tools and they pivoted to something else. Maybe voice agents? They're cool folks.
Now Weights.gg is leading the "TTS for teens / consumers" space. There are dozens of startups in the voice conversion for music production space. This used to be an easy ramp to revenue, but the market is saturated.
I personally have another example. Own MM B2B.
But no, I don't think the point stands, because they are not selling an ebook or anything else. The pattern you identified exists, but I don't think this matches the pattern.