I‘m the developer of BetterSnapTool and have also discovered & reported this to Apple about 3 weeks ago on July 2. They are investigating and keep deleting (some of) the fake reviews, but I have no idea who is responsible for them or what they want to achieve.
I think the fourth reason that has been discussed here and in Jeff's post also sounds plausible:
- somebody wants to push his app with fake reviews, however that would be easy to detect / trace back. Thus that person buys additional positive fake reviews for other apps (that are not in competition with his apps). This makes it really hard to tell which of the apps "purchased" the fake reviews.
I was thinking exactly that: BetterSnapTool has great reviews and many great reviews at that. I can't see why you'd pay money to have... more of those?