Last time I gave some serious thought to FB's revenue problem this is what I came up with. They'd have to find a way to sneak in a few initial tiny costs that

Last time I gave some serious thought to FB's revenue problem this is what I came up with. They'd have to find a way to sneak in a few initial tiny costs that don't abruptly cut off users who don't pay (i.e. limiting # of photos etc...). Once you get enough people with their credit card info in there, make it easy as heck (one-click) to upgrade to "Premium" or something and push the Premium site hard. Microsoft does this with their Xbox Live service. It's so ridiculously easy to spend money on that service once they get your CC# for something tiny. All you have to do is press the X button (or something) to buy just about anything.