http://news.ycombinator.com/item?id=2033180 http://news.ycombinator.com/item?id=2033180 referred to this a while back. centipaid.com talked about having a scal

http://news.ycombinator.com/item?id=2033180 http://news.ycombinator.com/item?id=2033180 referred to this a while back. centipaid.com talked about having a scaleable micropayment solution. However, almost any solution requires one to have money 'in the system' and earn/spend the micropayments, and pay a fee to take it out or put money in. There are a number of other providers that do this through stored value Mastercards, etc, but, those fees sometimes become prohibitive. The way I've seen a number of companies handle micropayments was to keep the money in the system, but, you couldn't get it released without earning $25 which kept administrative costs to a minimum. You had to fund the account, but, if you didn't spend it all, you couldn't get it back. Facebook credits work in a similar manner - one purchases $x of credits, then can spend those coins on various apps.