Most people came to Lemmy becaise they felt personally agreived by the Reddit API issue. They don't give a shit about what's good for the Internet, or society.
They're here out of protest, and would happily give their all to the next Billionaire that makes them feel smarter than the average bear.
Anything niche by computer geek standards So, like, anything from normie interests to things that are so niche that you need 30 million MAU to have an active space.