I appreciate the thought that went into the snip proposal, and it sparks ideas. The downside to this is the level of tracking that has long been a staple of the ad industry, and this association is not aligned with the ethos of Bitcoin. Taxing time engagement also has issues. Possibly paying with final settlement while you are afk sounds like a bad idea in principle. If there is an afk toggle, that will be one more thing to remember that adds stress.
What about starting with something super simple like offer a configurable auto-zap feature for every article opened? I would opt in for that.