During college English, our teacher gave us A Very Stern Look and told us that if we used any sort of online paper service to turn out any of our papers, we were not to think that we would get away with it. We were warned that the english department was Very Smart and would Catch On.
(She then paused to explain to us that, during research, we could come across these things called "hyper....links" and this was what we should do with them...
)
At any rate, this really looks like the sort of thing she mentioned. They say that you can buy an essay on a particular subject and "cite it as a reference," but that sounds like so much smoke. I suspect you buy an essay, slap your name on it, turn it in, sound like you know what you're talking about.
I don't have anything concrete on 'em, that's just what it comes off as when I browse the site. The writer-end of it may be fine (if morally wonky) though I suspect you get a one-time sum for your article and see nothing about it ever again. Regardless, it sets off my Spidey Sense pretty quickly...
Addendum: ...and now, having gone through their Q&A Section, my Spidey Sense is screaming and running madly for the hills. Still don't know about writing for them, but
buying from them looks iffy.