> This may be legal in the US, but not under GDPR.

This whole story is an amazing example of why the GDPR is correct about this, IMHO.

There are soo many examples from the US showing why GDPR is a good thing: Clearview AI (biometric mass surveillance, essentially "search the internet by face"), car manufacturers collecting and selling location data, phone companies collecting and selling location data, ISPs collecting and selling browsing behavior, companies running mass surveillance on license plates and selling the data to law enforcement and really anyone who pays, some DNA sequencing related abuses that I don't remember the details of, all the data collected by the ad "ecosystem" (note that this still happens in GDPR-land because enforcement is lacking), this, ...