I refused to use adblock for years. Not because I thought Youtube needed MORE money, but because I did realize that a business ultimately only continues operating as long as the business model is sustainable. I endured, through occasional ads, ads at the bottom, then through ads every time a video was watched, then ads in the middle of videos, and even two ads before every video.
But three unskippable ads was where I drew the fucking line. Now I use adblock for Youtube and Youtube only.