Lol you sweet summer child, they don't care if the ad is relevant to you, you're not the customer. https://medium.com/@Glenames/programmatic-advertising-101-c9...

Your eyes are the supply. The demand (customer) is people wanting your eyes. Relevance in ads is if your eyes are a candidate to at some point buy their product.

What your taking about at costco is essentially house ads or really signage.

Remember unless you are a brand you are not the customer for ads.