> While this was going on, we got an email from their sales rep, congratulating us for increasing our spend by more than 8000% and wanted to have a chat. So I guess they do have the systems to monitor unusual patterns, they just turn a blind eye.

At this point we're entering criminal territory. Enriching yourself when you should reasonably know something criminal is occurring (like someone being defrauded), and helping the perpetrator by providing your service anyways, can make you a criminal yourself very fast.

As far as judges will be concerned, you're now a perp yourself.