Oh, and the reason I think that shopping on Facebook makes sense? Because of course if you let people do their shopping in the time that they have available whi

Oh, and the reason I think that shopping on Facebook makes sense? Because of course if you let people do their shopping in the time that they have available whilst they wait for that shared social event. Then yeah, they'll rather do that than leave Facebook and do it elsewhere. The rule for success on Facebook given all of this: Allow whatever you provide as a service (shopping, gambling, games, etc) to be interruptible. Your service isn't why people are there, but they'll do it whilst they're waiting. But if that shared social event emerges in the midst of grocery shopping or game play, then your service must allow them to instantly stop things.