There's a page of reviews on cryptocompare.

Seeing the reviews at first I was inclined to believe that they were legit.  However, upon seeing the users' profiles who left some of those reviews, I've decided that they are most likely a scam or at least engage in the shady business practice of paying for fake reviews.

Here is one of the users who left a five-star review of their service.  Despite having uploaded an avatar to look real, this person only has one review - that service - and he has upvoted all other positive comments about the service as well as downvoting negative comments.

If possible, use a trusted escrow.  The chances are that they will not do that, in which case don't buy.

TL;DR: unknown company creates entirely new miners and engages in shady business practices.  Possible/likely scam.