I pay for several subscription services, yet they always want more and more of my data. Whatever I give, it's never enough, they want to have their cake and eat

I pay for several subscription services, yet they always want more and more of my data. Whatever I give, it's never enough, they want to have their cake and eat it too. I use open source stuff when I can, and similarly, I contribute to the projects when I can. This seems to be the only legitimate way to avoid ads.