I started a solitaire website 5+ years ago. When Covid hit, I ended up finally putting ads on it. Since then it's been growing steadily and about half a year back I made it my full-time gig.
Good site. I just gave you at least an hour of ad views because I can't ever stop until I win one. :) Note that on chrome on linux, the ads get quite heavy and slow everything down after 5 or so games, and I have to reload the page or it's too unresponsive to play.
I improved the game and functionality over time. The game has always been above the fold, but the content was greatly revise this past year. I've been doing a lot of optimizations on the game, but nothing big. After all, it's limited how much innovation can be done a game like that .