Some people are getting into a lather over Twitters new terms of service. They’re worried Twitter has right to use your material. I’m not one of them.
If you don’t like the terms of service, shop elsewhere.
For me, Twitter is about sharing, and that implies you’re not putting a commercial value on your contribution. Go somewhere where they’ll pay you if you think your material is worth dollars.
Twitter gives you something for nothing. Surely they’re entitled to some return (particularly as they still haven’t worked out how to make money).