I'm a bit pessimistic as to whether this will work, because the crux here is getting the publishers to agree to this model and that's going to require a ton of face-to-face deals.
That said, I've had this idea myself and this is how I want the web to work. I should just be able to pay to make ads go away if I don't want them and that money should go to the sites I read. I currently use Google contributor, but that only works on some sits, not all.
I also kind of like the "threat" that people are adblocking anyways on your site (which CoinTent will know, as their plugin is an adblocker) and you are losing this much revenue because of it. Seems like that could work if they reach enough critical mass.
So I supported this, though with skepticism. Godspeed!