I'll admit, I don't get it. It's been four years now and yet Twitter is pushing forward with an advertising based revenue model (at least, pushing forward via a 3rd party). I'm not Twitter, and for me to sit on the sidelines and recommend a revenue model for a service I'm not a part of is pretty weak. But that said, I honestly think people would pay for a Pro twitter service if Twitter would simply offer one. I think back to my days in the BBS era when we would all pay $50 (this is back in 1990, so probably more like $100 now) simply to have a (+) next to our BBS name. That's a form of vanity ...