The way ads are displayed effects how effective they are which in turn effects how valuable they are. More people turning to adblockers reduces the effectiveness of the ads and devalues the advertising method as a whole, more adblockers being used, lower effectiveness. YouTube then has to resort to putting in effort to combat adblockers which itself costs even more, ads have to become more intrusive to retain their value so YouTube can maintain it’s own servers and pay it’s content creators and it becomes an endless cycle of “fuck you I want your service for free and you are trampling my rights for trying to profit off me using your product”. In return all YouTube asks of you to obtain an ad-free video watching session for a month is $4 ($22/month split among 6 users)