[declan]

I used Twitter quite a bit for work purposes (before I left CNET/CBS last year to found a recommendation startup) and might have paid for it then.

But the value for me was in interacting with a large number of people, and I suspect even charging a few dollars a year would lead to the vast majority of accounts disappearing, reducing the remaining users' incentive to pay, leading to more accounts disappearing, etc.

[moey]

Lets say one had to pay 1 cent to tweet, don't you think that the quality of data would be much better? A lot of spam bots would be out of business.