Are these games viable financially nowadays? It feels like most people don't play games in the browser anymore, and those who do don't spend much money, and often run ad blockers. Can you live off of making web games?
There's an article here [1] that goes into detail. The author was averaging $1900 per game, releasing one every other week.
I think the dream of most people is to not sell the game to someone else, and instead create their own revenue stream from it. But that's probably much harder.
I also found it interesting that they were using Unity for web games. I would have thought it would be best to use a JavaScript framework to reduce file size, and gain extra performance.