not defending youtube or ads in general, but technically the ad companies don't pay unless the ad is viewed/served, or only pay depending on how much of the ad is viewed. they aren't double dipping like this is implying.

youtube is only getting paid if an ad is shown, and depending on the duration of the ad only for the duration of the ad that is shown to the end user. for like s skippable ad, for the first 30 seconds you can't skip they get paid for that 30 seconds, but if ithe ad is longer say a minute, but the skip button appears after 30 and you press the skip button youtube only gets paid for the 30seconds the ad was displayed. if you don't skip then they get paid for the amount of time the ad was shown.

if you pay for youtube premium, then they don't show ads, they don't get paid for ads not shown. but that's why you are giving them money. to compensate for the "lost revenue" they aren't getting from ads.

and for things like adblockers, the ads are not served therefore don't qualify for being billed and youtube doesn't get paid. and youtube pays channels based on performance of ads being displayed, and that's why a lot of channels have both ad spots and sponsor segments. that and youtube doesn't pay real good for ad revenue unless you are a huge channel.

and then sponsor block skips sponsor sections for you and some sponsors/channels don't care the contract was do a sponsor segment and those contracts are outside of youtube itself so youtube doesn't get paid for them, that's why there isn't a sponsor skip action when you pay for premium. but i fear sponsors will corrupt and start doing contracts where they track how many times a segment was viewed and pay out based on that metric too.