Good question! but I don't know the answer. maybe its a paradox :) I know everything has to move forward and evolve! Anyway, I like the 140 Character limit on Twitter. My post is acctualy exactly 140 characers long :) as most of my tweets. Just wanted to point out, that the current popularity of Twitter is based on current state. And maybe some payment options would be fine for people who care andn consider Twitter as the source of news and knowledge.