Won't this just have the effect of rendering Twitter's data/product less relevant?
Sure, they should be paying us to post there
Amen, brother! Twitter users' Valuable Intellectual Property is the sole and only thing that supports Twitter, and people have just given their IP away.
Will this affect SSO with twitter?
Mobile SSO has already been broken on Twitter for a few months. I’d begrudgingly pay for SSO for my app.