It's not really ironic. Adblockers know that in the end run if everyone uses adblock, the internet will just get paywalled plus small sites may not be able to survive. On the contrary, there are many ads that take advantage of exploitable code or the like causing security issue. So what some adblockers did was create a certified ad vendors list. They do get paid money in some cases, yes. But the goal is to approve ad vendors who don't do intrusive ads. For example, non-deceptive text based ads and etc. In this way they created a compromise between serving of ads to keep sites alive while serving the purpose of adblock which is to prevent getting a virus or eating resources shuffling through thousands of redirects or page being eaten by ads.