You also have the problem of perception: The "mental cost" of having to pay facebook every month 50c is far greater than the financial cost (in this case, the 5

You also have the problem of perception: The "mental cost" of having to pay facebook every month 50c is far greater than the financial cost (in this case, the 50c). I think this was one of the problems flattr.com tried to solve but not successfully. Have a centralised "bank" (eg. flattr) that would collect everyones 50c and then distribute them accordingly. The user purchases credits from the bank and the bank gives money to the providers in a way that keeps the "mental cost" at zero (or minus zero, if you actually feel happy at the end of the month).