Well, everyone does actually get the API key and is able to use it anytime they like -- I really need to do a better job of explaining the product, features, et

Well, everyone does actually get the API key and is able to use it anytime they like -- I really need to do a better job of explaining the product, features, etc on the site. :) For the API customers, I've ended up haggling deals with them to get them on board. In general, I give those guys the ability to prepay in larger amounts to get a better per-piece rate or postpay for "higher" rates (believe it or not, most of the higher volume API-only users prefer to postpay because it improves their cash flow situation).