Does anyone know of a CDN that allows you to pay using credits or some equivalent system? So in other words, rather than paying in arrears for your usage you just pay an upfront fee for a certain amount of bandwidth and then when it's gone it's gone — service suspended.
I ask because I have projects where CDN hosting would be nice, but having recently read about the concept of 'Financial DoS' attacks where a site's CDN is hammered at a relatively low rate but enough to cause significant bandwidth build-up I'm not really willing to put my money on the line like that.
Knowing that someone could come along and start hitting my files so that I build up huge costs is enough to make me go 'no thanks'. So, a pre-paid or credit-based CDN would be just the ticket and probably something a lot of small project owners would appreciate.