Three weeks in, no background in marketing, money spent that he did not have: the review here comes from that position and says so out loud, which makes it more useful than a confident one would be. He is not telling you it worked. He is telling you what he decided and why he decided it.
The autism post stands apart from everything else. He goes after how a public health agency presents its figures and argues that the framing misleads parents reading it at the worst possible moment. Whether or not you land where he lands, he shows his working.
Elsewhere a juice company gets reviewed on its own terms, there is a piece about businesses that grow too large to be allowed to fail, and there is a straightforward explanation of how affiliate programmes pay you: promote somebody else's product, take a commission or a service in return, and expect the programmes to differ far more than they look.
His advice there holds up. Compare before you sign anything, and check whether the suppliers you already like run a programme.
Read the autism post first, then the review.