I think the most worrisome, and presently most likely, outcome is an arms-race style battle of iterative workarounds that will end up producing less revenue for producers, and provide consumers with a worse experience with higher friction.
I don't necessarily disagree with that especially given that there is a current arms-race to try and maximize the number of ads on a page.
However, I also, think that once the ad bubble bursts people will start to be creative in how they monetize. Most will get it completely wrong. The few who figure it out will eventually lead the rest.
Something has to give. It cannot keep going the way it is. It's neither producer or consumer friendly.