What if the fake reviews were paid for by a competitor, so they would get banned?
What if Apple just happened to be smart enough to think of the most obvious, very first question that would need to be asked in this situation?
Edit: Seriously, what question can I ask? This sounds like a fun brainteaser, like the one where half of the people on an island are liars and half are truth-tellers, and the explorer has to figure out which fork in the road leads to the village. If there's an answer, I'd genuinely like to hear it. Downvoting me is just a way to shrug your shoulders and admit your bluff has been called.