giving anything to the user in return for a good review should be grounds for disqualification from app stores. (and it should be legally required for app stores to enforce it)
The Sweden that gave us Spotify and Candy Crush (the game that showed every tech company that they need to incorporate really really awful manipulation of users)?
I am not a lawyer, and especially not a Swedish lawyer, so I can't say how illegal this is in Sweden or what if anything will happen.
[0]https://www.konsumentverket.se/en/articles/report-to-the-swe...