I'd also say that $8 a month is a great price to astroturf for a month. Also why is the idea of Twitter monthly even sensible? Who plans their Twitter identity

I'd also say that $8 a month is a great price to astroturf for a month. Also why is the idea of Twitter monthly even sensible? Who plans their Twitter identity as a power user month to month? Why is it not just $100 a year?