Subs on twitch have other benefits though, both ~tangible (most depends on the channel I guess, but they all do) and social. What would twitter even have? If it's just a paid adblock, that's not exactly compelling.
I feel like removing ads plus any kind of visual indicator like a "Pro" label or some kind of icon next to people's names would be vastly more successful than Super Follows. Plus maybe adding in or or two relatively simple paid only features that have been requesting a lot (I don't use Twitter enough to know what these could be)