How so? Google has no in app purchases on any ios device and they get nothing from maps,gmail and Google music in advertising.
The only google app that makes google money is youtube on ios and android has 85% world market share right now.
Its the other way around.google has the upper hand and could make ios horrible without native youtube and maps alone.
I think alot of ios users would be pissed if
maps
youtube
music
were taken out the market
Also what arrangement do they have? They are giving apple services for free and can't even use there services to there full potential with in app purchases
In 2012 at least, Google was reported to be earning more from iOS than Android. Which suggests that for all its larger market share, Google is still having problems monetising its services on Android, and that iOS remains a very lucrative market base despite its smaller market share.
Google could certainly remove their services from iOS, but that would simply be cutting the nose to spite the face, because at the end of the day, Google simply suffers from significantly lower revenue.
I myself am using Apple Maps exclusively. I don't use Google Music, and if youtube were removed from my iOS devices, I might be annoyed, but certainly not annoyed enough to switch from Apple devices.
Nothing is free in this world. You know how Google's services work. People using them effectively have their data collected so Google can work out how to better serve ads to them. Google is certainly not as generous or as altruistic as you are making them out to be.