Twitter pro accounts coming by year's end
There's not a whole lot of detail available. But paid accounts will definitely involve statistics and analytics that aren't available through Twitter's existing application program interface (API), and possibly a whole separate "commercial API" for business-related applications. This adds to a move earlier this year in which Twitter started rolling out an account verification process for prominent users.
Twitter's Evan Williams: Making money through corporate accounts?
[Twitter's Evan Williams] spoke obliquely of a possible business model that we've heard whispers about before, corporate accounts for businesses that want to use Twitter. Twitter is a communication channel, he said, and what it can do is "charge the people who want to use that communication channel commercially."