[mavhc]

From 1700-2000 you just had whatever adverts everyone else had.

From 2000-2010 you had site/search based adverts

From 2010-2020 you had tracking based adverts

I can't think of even 1 time I've seen a useful advert though

[berkes]

I can.

And almost without exception, those were relevant ads, not targeted.

Relevant like getting a coupon code for digital ocean storage credits below an article on how to run your own IPFS host.

Or relevant like getting an offer for pizzafriday on the 'where to eat' information section of a campsite in some unfamiliar city.

[GoblinSlayer]

For me usefulness and relevance aren't a problem, I block ads because they are ugly.