All EU companies sending any PII to US-owned companies, regardless if the actual data stays in the EU or not, are in danger to be sued similarly to the author of this post. This is, among other laws, because of the US CLOUD act: > The CLOUD Act primarily amends the Stored Communications Act (SCA) of 1986 to allow federal law enforcement to compel U.S.-based technology companies via warrant or subpoena to provide requ…
Also, since the EU considers an IP address to be PII, anyone in the EU is not even allowed to connect to any website owned by a US company, as the IP address is a necessary piece of data to make the most basic TCP/IP connection work. Basically, the EU has put up a legal firewall between the US and the EU. Somehow this hasn't been realized fully or openly talked about, the the implication of their law is very clear.
Ie. logs should be ok if its to combat DDOS and the like (for a limited time, ie 24h), but not for advertising purposes.