I understand. I would not 1 star a paid app for $5 because I wanted it for $0.99, that's dumb (though think about how smart the average person is, and assume half of them are less than average, and they all have phones too).

Let's say a free app advertises "play online with friends and play by yourself" and is free to play, free to download. Then you finish wasting 2GB of your mobile data ($30+ in US) and create an account (monetized, spammed) and now you find out that a mandatory payment IAP is required to play multiplayer. That deserves 1 star and probably a report.

Unrelated: You also have the shitty-behaviour apps that are either legitimately good or bad, but pop up "RATE US 5 STARS" every other launch. I would like those permanently banned from the store forever.