Remy has been posting a series, The toxic side of free. Or: how I lost the love for my side project, on JS Bin, and Part 4 covers how he started Pro Accounts and some of the unexpected costs – that is, carders would use the low price to test newly stolen cards and eventually he’d get chargebacks. The Hacker News discussion includes some advice on using minFraud (Sift and FraudLabs are other alternatives). Amazon DevPay also sounds like a good alternertive to building your own billing system.

Also, VATMOSS sounds terrible.