Netflix has a ton of games, if you've never noticed.

https://help.netflix.com/en/node/121442

It's a membership perk.

Probably the Android equivalent to Apple Arcade. I know one dev who released their game on Apple Arcade and had said that the exclusivity deal is too good to reject. It isn't viable to sell the app stand alone because people just don't buy apps anymore. But bundling it in to an existing subscription works because you get paid regularly and don't have to convince users to buy anything which is a hard task.

The funny thing is, World of Goo was already released this way on Android, and the old version still works fine offline.

Too bad it's no longer available on the Google Play store.

For the same reason they won't let you pay for a movie and keep it. It's a worse business to be in.