Out of the blue yesterday my phone asked me to rate Firefox. I think Google is trying to create a facade of competition where there is none by stuffing the Play Store review stats.
Have you never been asked to rate apps before? I heard about google "randomly" asking people to rate restaurants they recently visited, so "randomly" asking people to rate apps they installed doesn't seem too out of the ordinary. It's definitely not enough to think "Google is trying to create a facade of competition where there is none by stuffing the Play Store review stats".