Sounds like something that would make sense to implement on top of Twitch chat. You already have a payment infrastructure tgat allows attaching arbitrary amount

Sounds like something that would make sense to implement on top of Twitch chat. You already have a payment infrastructure tgat allows attaching arbitrary amounts of money to each message, as well as a baseline reading for either free or sub-only($5/month) chat. Of course you'd need to do it in cooperation with an established Twitch partner. Can't just create a new channel and start charging.