My preferences are based on my understanding of myself.

I do not have those problem addictions. Of course I am going to comparison shop for any large purchases. I am good enough about controlling spending that excess junk isn't one of my problems.

But what I do have a problem with is coming up with creative ideas for people in my life. So, for example, I would have never thought to look for https://www.zazzle.com/cup_equation_love-168099175298227864. But I'm very glad that someone out there knew enough about me to guess that this might be an item that I'd like. And my wife liked the cup a whole lot.

Does this happen often? No. But I'm perfectly happy to pay a premium for a product when an advertiser gets it right.