Quality ads would be like "hey see that you are buying Topo Chico. Why don't you try these new flavors as well at a discounted rate?". Instead of "Buy Nestle water" ads. Or something very unrelated. Basically a win-win situation for both parties.

But to be honest I would be very much reluctant at seeing a lot of ads. They do this already with "Sponsored" products and most of the time it serves as distraction instead of convincing buyer into even at least clicking their ad.