> This makes my ad profile useless

I have a theory that it doesn't. Which set of companies' logic is more likely?:

Is LadyCailin a "tree-hugging liberal"? LadyCailin clicked on a lot of Sierra Club and PETA ads, so yes. Good, we will add LadyCailin to this list.

Is LadyCailin an "extremist right-wing nazi"? LadyCailin clicked on a lot of prepper and gold ads, so yes. Good, we will *also* add LadyCailin to this other list.

OR

Is LadyCailin a "tree-hugging liberal"? Well, they clicked on these ads, so we think so, but then they clicked on these other ads, so we're not sure. Then she clicked on these other ads, now we don't have any idea.

Speaking from personal experience: Because some people have used my phone number and email address as their own, I get emails for one political party and text messages for the other political party.

It doesn't make my ad profile useless to the people sending me ads.

Give your phone number to both U.S. political parties. Congratulations you will get spammed by both. I doubt they are cross-checking.