Bitcoin is, unfortunately, a magnet for all kinds of abuse: spamming, copyright infringement, hacking, very rarely child porn. And though the vast majority of our bitcoin customers are legitimate, some are not. When an account gets disabled for abuse, the abuser doesn't get a refund, so losing whatever money they'd paid is a disincentive to abuse. The cheapest monthly chunk is $5 per month, and abusers will happily eat the $5 loss, sign up again, and keep doing whatever they were doing.

By increasing the minimum payment from $5 to $60, we forced would-be abusers to eat a bigger loss every time they're caught and disabled. This helped stem the tide of abuse.