I know few web sites that has unblockable ads. Mostly nerdy themed websites that has relationship with small nerdy webstores. They just host the ad themselves and it's a part of the site.

It's cheaper for a webstore to pay one good website personally, and people trust ads like that a lot more. It's almost like a personal recomendation from the team curating knowledge base.

And no ad trackers, plus quicker website, win/win|win situation for everybody