It's still an ad though. It's just a context-targeted ad: You get it because you use this product and they want to upsell you. That you might want the product doesn't make it less of an ad. On the contrary. Discoverability is one the purposes of ads. Increasing perceived value is another one but not the only one.

It's the line of thinking that companies like Google tend to push. "All our tracking gives you ads for products you are more likely to want!". Well, yeah. Because those ads are more likely to convert to a sale they are more insidious in my view.

I always like it when I see ads for things that I absolutely do not want because it means they haven't figured me out properly. The few times I watch Amazon prime I tend to get car ads, and I hate cars, I'm never going to buy one. Or dodgy gambling website ones, I don't gamble at all, not even a lottery ticket. It means they don't know what I really want and the ad doesn't really put mental pressure on me to part with my money because it's irrelevant.