@formerstudent I'm aware of that. unfortunately, there are multiple issues here. From how easy is to register a UK company without real identification to making fake claims and stealing others work. I mean, on one of the sites in this network, the team's photos are actually HarperCollins top team photos with made up names.
Sure, the best way to not fall for this is to write your own thesis, essay or book. or just do proper research before. some of these sites have thousands of visits per month, and others are in the scam business (registration dates) of almost 10 years..