Its very interesting in that when people read "relevant" ads, they usually take the meaning as "relevant to buyer".

But in reality, ads are always "relevant to seller/advertiser". Seller is almost never interested in selling you anything but what makes most profit from you. Eg. A decathlon might be better cost/benefit ratio wise, but you will always get an ad for Nike, because Nike is paying for the ad, not decathlon.

Such is the lie that was fed to us, and most of us accepted it. Tragedy of the commons indeed.