I believe ads work — but I’ve seen little evidence anything beyond contextual ads work.

But yeah, show someone on a blog about new GPUs an ad to buy a GPU and there’s an uptick. Turns out some of those people do want to buy GPUs.

Showing me an ad for GPUs on the YouTube page for cat videos because I visited that blog previously is weird.

Like a friend going, “so looking at these cats reminds me — do you want my friend Dave’s GPU?”