With sufficient mental training, any person can add an ad blocker to their own brain. The mind of such a person instantly disengages the instant it detects an unsolicited sales pitch.
Having conceived the end goal, we now imagine such tools as may be helpful to achieve it. Perhaps it is useful to build a tool that blocks the most intrusive and annoying advertisement on Earth from the senses of the human whose internal ad-blocker is not yet perfected. Expand the tool such that progressively less annoying ads are blocked for those with progressively less perfect anti-ad discipline. Continue until the tool allows one with no training whatsoever to have the same ad-free existence as the adblock monk.
Once the person has chosen to not attend to unwanted ads, there is no countermeasure any advertiser can take. The human is the ultimate arbiter over the thoughts that enter its own brain. Whatever cannot be blocked can be ignored. It is the desire to ignore that leads to the blocking.
The traditional method to alter the desires of the consumer--advertising--is not likely to affect a desire that specifically targets advertising. You can't get people to pay attention to ads again by advertising for the practice of advertising.
All you can do is stop the bleeding, by immediately curtailing all practices that led people to start tuning out ads in the first place.
At this point, if you want me to attend to ads, you will have to pay me, directly. I will open one end of a channel that leads to me. If the cash stops coming through, I'll close it. If the cash that comes through is insufficient to compensate for the peace of mind I would otherwise have by closing it, I'll close it. I will then take that cash, and spend it on whatever it is that I would like to be ad-supported. Maybe I will spend a little on something that was advertised. Maybe not.
An advertiser might ask, "what guarantee do we have that you will actually pay attention to the advertising we push through that channel?" And my answer is that no advertiser ever had any such guarantee in the entire history of mankind. Even my own spouse peppers a seemingly unending stream of words with frequent "are you listening?" pings. If my own spouse cannot trust that I am paying attention at all times, no advertiser stands a chance. And as I find those pings to be annoying, anyone else that asks the same thing is likely to be told, "I was, but now I no longer will be."
Advertisers are just going to have to accept that most of what they do is a waste of money and effort. They are broadcasting seeds with a low germination rate, with no way to test beforehand which ones will ever sprout. If you don't throw them all out there, all the sterile seeds along with the fertile, nothing will ever grow.