Comment by jorvi
Don't let everyone responding gaslight you. YouTube Premium is absolutely stuffed with ads[0] (sorry, 'promoted content' / 'sponsorship'). The only probable explanation I have for this is that Google has successfully boiled the frog and people mentally don't even register these things as ads anymore.
And that's not to mention pretty much every single creator stuffing sponsored sections into their videos now. We have Sponsorblock for now, but I imagine Google will try to introduce random offsets at some point which will render Sponsorblock mute. Maybe an AI blocker will rise up in the future?
At any rate, fight fire with fire. Just use every bit of adblocking on desktop, Revanced on Android and hope that Revanced or Youtube++ comes to iOS 3rd party stores at some point.
[0]https://imgur.com/a/3emEhsF
Edit: since people are too lazy to click on the link and instead ram the downvote button in blind rage, image 1 and 4 contain straight up ads, unconnected to creators.
I think people just decided it doesn't count as ads when it's the creator doing it. And it feels more tolerable since the money is going to the creator that they probably like instead of megacorp Google.