This is very good information. I may even expound on it later on our website. For now, I just want to say that many students who get ripped off really miss a bunch of red flags. They say you shouldn't blame the victim, but sometimes I can't help but to blame the victim.
When it comes to essay-writing companies, the biggest red flag is any company that contacts you by using a bot (on Twitter, FB, etc). That just screams "organized fraudster." The OP addressed this already, but I want to emphasize it. I can't believe that people routinely fall for that sort of thing.