Best approach to micropayment yet. In fact, this one may well succeed. I can't think of a way to improve the mechanism - sure, it'd be nice if the tips were cas

Best approach to micropayment yet. In fact, this one may well succeed. I can't think of a way to improve the mechanism - sure, it'd be nice if the tips were cash redeemable, but I realise it's not your fault, and you've made the situation pretty clear. I know it's been mentioned by others, but I think your site layout needs a little work. In particular, your mechanism is pretty simple, yet you hide it in some text in your FAQ. Put up a "how does it work" page with a flowchart or something. Oh, one more thing: what about mentioning the tip amount on the "Tip this" button? I know, it would make it marginally bigger, but I think it would help, psychologically. People are probably (well, I am) very wary to press a button that implies payment (if they've not signed up) or actually "destructively" affects their balance with no check-back confirmation. (if they have) Putting the amount right there would definitely put peoples' mind at ease. I've not read your client-side code, but I'm guessing you guys have made a decent effort to avoid cross-site scripting fraud where embedded buttons are auto-clicked by a malicious script or something. Right? In any case, keep up the good work!