I'm sorry but do you hear yourself? A multi billion dollar company is not incentivised? To what? Follow the law? Tying is not allowed... The fact it's hard should not be a factor. It's also not as if they have not had some time to fix this issue already. But as you write, there is no profit in it (following the law).
But this is the essence. It is not profitable to follow some laws, and if a company chooses to not follow it. They have been told by their lawyers this is a potential liability many times. Then you bring down the hammer.