subscriptions revshare model
bits revshare is obviously not enough to build a sustainable small/medium business on twitch extensions atm (except 1-2 examples out of hundreds). reasons behind as I see them - extensions are for small streamers mostly. middle/big ones are not that into extensions as a product category. thus even being featured 24/7 doesn't provide enough viewers to actually get $1000-5000 dev payout for most of devs. not to mention retention aspect.
moreover streamers are not that eager for bits. their current meta is to grow subs.
so the idea is to provide devs with ability to work with subscriptions and get a share of it per tier whenever streamer is getting new sub with the extension. in terms of the amount - same 20% would do.