One internet seller of philosophy essays for students has a helpful FAQ section. Along with questions about security of payment comes this:
Am I breaking any rules by using your services?
Absolutely not. We provide custom research and assistance to students who are in need of our services. We understand the difficulty and time commitment needed to produce excellent papers, especially in the field of philosophy. Get the advantage of having a model paper written to your exact specifications by an experienced writer you can trust. Let us do the research and dirty work, so you can spend more time focusing on more important things.
No link, it would only advertise their “services”.
There remains one foolproof way of detecting internet products from original work. The internet company assures purchasers that its essays are plagiarism free.