The supposed peer-review is done by people who only upload empty PDFs, pictures of their feet, the same scan of a russian document over and over and people who clearly didn't read what they were supposed to do. Now when barely anyone seems to give a damn, what do you expect from the reviews? Yes, that's about it.
Half the content is lackluster or just confusing short videos that don't even try addressing anything, if the tutors have actual courses on the subject, those might be interesting, the videos aren't.
So if this is interesting to you, just go with the freebie. You're not getting anyone's money's worth in return because the process is deeply flawed. I won't even wait on my "certificate". I stopped caring about any of this once I saw what a train wreck all of this is under the hood.