I don’t think I’ve ever intentionally clicked an ad, with the very very infrequent exception of product results that come up in searches. It’s literally never been to buy the product, though. It’s to see if I’m interested in doing more shopping around. Ads are never for the best priced or highest quality product, but if it’s something you’ve never looked into before they can be informative, and it’s easy to access.
But since I started running a pihole years ago, I don’t even do that, because it gets blocked when I click it. Rightly so, it was a bad strategy anyway.