You seem to keep re-thinking, re-branding and re-posting the same idea, and I still have the same feedback -- who are these people reviewing the site? Do they have any experience that makes their reviews any better than anyone else I could talk to? Or is this just crowd-sourced out to the general public?
I have a crowd of reviewers (and always looking for more) which are pretty much from the general public and good reviewers get tasked more often. I manually review the feedback replies to ensure the quality.
$5 for review texts (but with screenshots and gifs) and $15 for the video reviews. In the special request field you could narrow down the tester audience but that only works if it doesn't get too specific. The feedback itself is about the website, user experience and what the people think about the product itself.