[kd0amg]

> Clearly I'm missing something in my logic

Sampling methodology. Every ad impression in your sample was shown to the same person, but the ad industry is interested in billions of people.

[bavent]

I’m sorry, I don’t really follow. Could you explain a little bit more?

[cmorgan31]

You weren’t served a hyper personalized ad because those get expensive at scale so they segment your id into ad target groups. You fit some form of gym enthusiast who shows interest in rowing segment and some unfortunate rowing company keeps throwing their money at you in a useless bid.