The trouble with using twitch as a way to get 9th age out there is that you really need a critical mass of viewers if you have an infrequent stream that is obscure like t9a, otherwise nobody will ever see it. You may be able to at least generate consistent streaming by "sharing" a twitch account for all UB games that you choose to stream, though the donation thing then becomes contentious, and may be against the EULA.
I think there is some easy promotion available in twitch/creative for fantasy painting where you can promote UB, ETC, ect.
Regardless it is an awesome idea, and pinktaco is right that this is the new format for content, which is growing fast.
As far as making money goes, if I ever get back the hundreds I've spent on equipment I'll be happy lol. One day I'd hope to set up a Patreon or something and use the money for the stores terrain and tournament prize support. Realistically there's no money to be maid if you're under half a million views.