[jareau]

Most payment companies aren't able to (due to regulations) do anything particularly high-yield with funds they steward for their merchants. The amount of float a company like Amazon is able to make may factor into their revenue model, but I imagine they hold on to funds more for regulatory and risk mitigation reasons.

[_pius]

MG Siegler and John Gruber engage in some fascinating speculation about how Amazon uses their float here: http://www.muleradio.net/thetalkshow/51/

... which was inspired, in part, by Eugene Wei's thoughts on how Amazon's float gives them leverage: http://www.eugenewei.com/blog/2012/11/28/amazon-and-margins

[jareau]

thanks for the links. I can't speculate at what their requirements are for affiliate payments. I only know the requirements Balanced is placed under as a PSP. I imagine Amazon must follow similar guidelines.