Hi was issued a review copy of the service.
My link was placed in a really good article that felt like it was written around my link even though it is not. Even though the page has no search traffic or keywords, the site itself is doing very well on search. It has Authority score of 57(semrush), 26k+ search traffic, ranking for over 34k keywords and the site has lots of backlinks.
All of these would in turn pass some of that link juice and authority to my link that was inserted. If these are the kinf of sites on the OP's lists, I might order from him someday.