Most of these gift card codes and movie site logins or other sites login comes up from other hacking forums.I myself checked up a lots of methods similiar to the methods sold here.This is a really a big concern as incase if in future the account is suspended or gify card becomes invalid then the user will feel up scammed .
These leaks are available in the form of .pdf in those forums.Also want to ask up is selling up of .edu mail legit?
A first solution would be reporting those threads. Although, there has to be a clear sign of those accounts being cracked for your report to be accepted and the thread to be deleted.
That's why I'd suggest showing all those threads to
whywefight (they might be on his radar already), who is collecting those threads in huge report-lists to forward them to grue/lauda for removal.
For Spotify I do know a way to know whether the account is acquired by the way of cracking or not.