Another edit: I got a helpful reply.
There has been a response to your ticket:
Greetings,
Unfortunately, we are unable to provide further information with regard to our backend abuse filters.
If we may be of any further assistance, please do let us know.
Regards, * Mitchell | Support Team
Because it's pretty obvious to me that people would create throwaway accounts to probe for all the fraud checks, then start creating abusive accounts.
A lot of people just use webhosting companies as a testing ground before magging a real card and going on a spending spree.