[hadeharian]

It's not just "does it work?" but "what kind of customers are you getting?". Twitter seems more productive to me than any part of facebook, which seems to desire to ravenously consume one's life. It's only a slightly less consuming task than some online games (MMORPG).

You're purchasing time from people that are busy, and productive, and have a life that on the whole it not completely virtualized. Compare that with Facebook and MMPORGs of sorts, and there are some highly successful virtual people who live real lives in mobile homes and shitty apartment complexes. Not to say their overall quality of life is bad, but maybe their balance is off kilter some.