We once checked the activation of a peace of software which was very crappy because the server was down a lot. Turned out in case of a valid code it was returni

We once checked the activation of a peace of software which was very crappy because the server was down a lot. Turned out in case of a valid code it was returning a HTTP 200 OK. The software never contacted it's home server again, but instead a hosts file redirected the request to a random server.