As someone who used to build f2p games, it's not addicts gambling. It's very rich people who don't even think about the sums of money a f2p game is designed around. At $BigF2PCo we even set up a wire payment system for these players and direct chat with customer support and the development team. They expect a white glove level of service.
Game addicts can exist at any monetization level. Governments have been passing laws to further regulate f2p and protect those players. Total money spent is not a reliable way to identify them.
While not to that extent - I play Hearthstone (poorly) via the app store but have enough disposable income to buy packs to get the good cards when they're released so that I can play the game and enjoy it.
Now this only adds up to dozens of dollars per release, but I suppose that puts me above $150/year, which feels to me like a reasonable level of support for the company to continue to offer a product I want.
Game addicts can exist at any monetization level. Governments have been passing laws to further regulate f2p and protect those players. Total money spent is not a reliable way to identify them.