Or, you know, pay for the content you consume.
YouTuber makes more money on average when a YouTube Premium user watches their video than what they would get from the ad-view if the person wasn't on Premium.
All in all it's reasonable IMHO. I might purchase it some time. The only issue is that this of course doesn't remove sponsorships baked into the videos, which annoy me just the same as the YT ads. So, I would still need Sponsorblock.