I cannot disable adblock programs installed at work, as they come with the software. At home I could, but I'd rather protect my computer than visit any forum. Many years ago another forum implemented subscriptions, and if you didn't want to pay, you lost a lot of features. That was the moment I said I will not pay a dime, if forced to. I donated before and I will continue to do so (on forums like 501st and of course on various charities), but on my own will. Also I haven't sold a thing on RPF in ages. On the other hand in my country under the communist rule we were also forced to pay a lot of taxes and had tons of restrictions, all for the "greater good". No more.
If this adblock pop-up thing will keep pushing aggressively people might simply leave the forum. There are so many options out there at this time and age, that implementing such a forced measure, when forums are taking a step behind in comparison with other social media, could be a suicidal action on long term. Just compare RPF now and a few years ago, people have migrated to other social media sites. Facebook has ads? Use Facebook Purity and they're gone.
Overlay pop-up actions to make members feel guilty for not becoming premium members (pay and not see ads, or not pay and see overlay pop-ups to make you stop using adblock, which in fact protects your own PC) might have exactly the opposite reaction.