I guess students will hire anybody who can fulfill their academic needs.
I don't know that I'd necessarily draw that conclusion, because there might be other explanations for the absence of negative comments, to whatever extent that's the basis of your conclusion.
I notice that one of the first things that happens when you visit the website is a prompt about executing a non-disclosure agreement.
Aside from the obvious red flag that this represents, it's quite possible that their disappointed customers are deterred by those NDAs.
They told me me to initiate a payment to start the work and they could share the samples of their work.
Regardless of where they're actually located and/or why they choose not to disclose their location more honestly, I'd have a hard time trusting
any writer or company that will only provide samples
after payment. That's not much different from some (other type of) service professional requiring payment before furnishing professional references, because the whole point of samples and references is to help prospective customers determine whether or not a provider is trustworthy and good, in the first place, as I pointed out earlier in this thread, in 2020. I discourage prospective clients from relying on "samples" except to the extent they just want to see my writing style after they've already decided that they consider me legitimate and honest. If you don't already trust a writer or company, you have no way of knowing that any furnished samples actually represent that writer's (or company's) work.