I know a great way to monetize an operating system: charging money for licenses. But this has some problems... buyers will make more demands instead of just ta

I know a great way to monetize an operating system: charging money for licenses. But this has some problems... buyers will make more demands instead of just taking things as they are because, "hey, it's free"! They might also decide it's too expensive and look for other providers, say like Jolla, Ubuntu or FirefoxOS. Charging money is pretty awesome for creating a vibrant mobile OS market, but it sucks for creating a mobile OS monopoly as a vehicle for ads.