Twitter has two subscription models. In addition to Twitter Blue (which you mention), they also have "Super Follow", which is more analogous to Twitch/OF subscr

Twitter has two subscription models. In addition to Twitter Blue (which you mention), they also have "Super Follow", which is more analogous to Twitch/OF subscriptions, in that you pay a bit to a specific creator, so you get a bit of perks from them. The fact that you don't know about it should say something about how enthusiastically the feature was received. Most creators are probably happier with their existing Patreon/OF platforms.