That would work because someone else "Google" is doing all the development of Android etc etc. Of course you can create a parasitic service for less.
Would it be OK for Microsoft to prevent Steam from running on Windows because Valve doesn't contribute enough to funding the Experiences and Devices org? I've never really understood why mobile platforms should be different from how we think about desktop ones.
Parasitic? Writing software for folks' devices and selling it isn't parasitic...it's just participating in the market. Weird that the overton window has moved so far that anything not built by the trillion-dollar duopoly is considered some kind of free-rider.
theres nothing parasitic about a competing app store.
it is parasitic to try and prohibit competing app stores and then leverage your monopoly by charging monopoly prices.
everything google is trying to do to discourage graphene, newpipe, competing app stores, etc. is parasitic and it's right that they are being fined by the EU for this behavior.
Google is not developing Android for the IAP fees, they're doing it to sell phones loaded with their search, advertising, browser and services. They take hundreds of billions in revenue annually from this, they are being paid several times over for that work even if they get no IAP fees.