I scrolled through some of the sample papers. Occasionally, one is not too incoherent; others seem to have been written for ESL students, by ESL students. In a hurry. I filled in some blanks and can get a 550 word paper on John Ashbery for $27.10. But I'm not that curious!
If these are computer-generated, they seem about on even par with Transformer. My main problem with plagiarized papers was that they sounded better than real papers and, thus, were easy to track down. Of course, these papers aren't plagiarized; they are ordered and paid for by idiots. Caveat emptor.