Where do you think Pratchett got the idea?! They got to him first and paid him off so we’d think it was ridiculous!
No joke, it wasn’t a flat earth thing, but I had a coworker years ago who was big into conspiracy theories and he claimed that movies like Men in Black were made to make everyone think that kind of thing only happened in fiction so we’d laugh at people who think it’s real.
When I tried to point out to him that there was no evidence for the things he claimed were real, he said the lack of evidence was proof, because it meant they were hiding the evidence.
If they make a bad product do you want more of it, even for free?
Like, reviewers get to the point where companies send them free product for review from a long period of legitimate reviews that get them a large enough audience. It’s unlikely they’re getting their main profits from free products sent.
Obviously you shouldn’t take a single person’s review as gospel anyway, but just them getting a review copy of a thing isn’t a sole reason to discredit their opinion.