Even if they do that, some people will just create illegal website mirrors that remove ads.
On reddit, people already copy paste articles when there's a paywall. I can totally envision that thing to be more common.
I am not fucking kidding, I will stop using websites if I cannot block ads. This is non negotiable. I don't care about your business model, I have zero money to give you. I tried the official reddit app, and uninstalled within a week.