Path of exile is another example. Many many years of new content, base game is free. You can buy increased stash size, which, while difficult, isn’t necessary, but massive QOL. You can also buy cosmetics.
Someone like me likes to support them for the hours I play, so when they release new context every 3-4 months and new leagues start, I usually buy something from them.
I don’t think I’ve ever gone on the App Store hoping it would have good recommendations for new things to look at. Do people find good apps that way? 99.9% of the time opening an App Store I smash the search button so nothing loads and search for the app I want.