My own feelings about the lead dev aside (I dislike him for personal reasons), this addon isn't very good, a lot of the rules and guidelines as well as the nature of the extension lead to titles and thumbnails that are subjectively clickbait and/or bad being treated as objectively clickbait and/or bad and being replaced with titles and thumbnails not suited to the content of the video with an overly complex whitelisting system not helping matters in the slightest.

It also asks for payment up front to use it right away, which is very shady for an extension. Though if asked, the lead dev will give you a code if you ask for one in a review, though not in exchange for a review, or ask on his discord server.

EDIT: Since the dev took time out of his busy day and replied to this review I will provide further context and say that these reasons were not communicated to me at all until after he'd removed my moderator status and blocked me and that I had to complain on his public discord server in order to get a response from him, which boiled down to "People were complaining about your attitude" which I was entirely unaware of and thus I was not given a chance to fix this problem until it was too late

If there were any other reasons besides that, then those were never communicated to me either
Also clarified some language about keys and reviews