Some home Internet plans do. I’ve seen AT&T had in their terms that if you hit 99GB, they would throttle your speeds.

This was years ago, so not sure if that changed or not.

Satellite plans often had limits too because they didn’t want to encourage lots of usage on their satellites. I haven’t checked in a few years, but last I checked, these weren’t throttle limits either, sometimes they had hard limits where you just couldn’t connect anymore once you hit the limit.