It's only a matter of time before adds are embedded directly into the video stream. Then addbock will have to recognize when an add is being played and maybe mute/blackout the video. If lots of people use that kind of addblock (I'm not sure they will), it will lead to an arms race making content and adds blend and mix until there is a continuum from content through product placement to adds.

Content creators already get paid for littering their content with adds. Right now, these portions are usually easy to notice and sponsoring is usually disclosed (except product placement). However, it's not a given this keeps being the case.

I expect the fact that addblock ever worked on YouTube and just skipped adds will seem crazy to people in a decade.