Things you wouldn't seek out unless you were first shown an ad.

MTG is a great example of the opposite. You seek out something fun to do with your friends. You happen to see an ad for MTG as fulfilling that need. Fantastic! Advertising works as it should.

But if I buy a print-on-demand mug as a gag for my sister's birthday, do I really need to spend the rest of my life looking at ads for novelty mugs? The gag is done. Nobody needs more mugs.