Just because a data aggregation site does not show your data on the front-end, does not mean they deleted it from the back-end. So now you can charge 50$ for people to search in the "special" data pile, where people took the effort to remove it from the front-end.

These data brokers crawl publicly available information. Telling them to remove your data, only slows down the doxxer, it does not stop them at all, since the data was already shared. It is not plugging the leak, it is mopping up some of the water. A false sense of security and a clear sign to the doxxer that you care about your anonymity (so more "lulz" to be had).

A proper doxxing is also much more than entering a name in some search engines. Especially hackers do not like to be doxxed. For internet civilians who already put this data out there (on social media) a simple data broker doxxing is a mere reminder that such data is public to everyone, not just friends.

Doxxing defense is guarding your anonymity online. Everywhere. Doxxing defense is knowing when to change persona's, and when to log off. That is: If you care about it at all. If you care about keeping your identity a secret online, see: https://www.youtube.com/watch?v=9XaYdCdwiWU (The Grugq - OPSEC: Because Jail is for wuftpd).