Running all of the web services at scale takes a chunk of money. Even Matrix has a paid tier to cover the costs of running the servers for the paying customers. The free tier performs as expected for being free and not ad supported. It’s not extra skimming if I end up with fewer annoying things in my face and some neat tricks to use when communicating with my friends.

Giving up those rights for anything your input into a commercial Internet service is fairly standard. All that AI data came from somewhere. Not saying it’s a good thing, just that it’s not atypical.