Last year I asked @Ev to let me pay him $20 a month/$250 a year for a Twitter Pro account which was on its own uber-redundant server cluster. Evan’s response was it wasn’t a cost issue but a software issue.
However, I still think there is a huge market–perhaps 1-5% of the twitter base–that would pay for a professional account. If 1% of 10m users would pay this fee you are looking at 100k paid users. At $250 a year each that is $25m a year in revenue.
That’s a lot of servers and developers.
@ev @jack: I’d think about.