Your IP is a lot more static than you give it credit for. It's not like the dialup era where you get a new IP each time. For example I have a dynamic IP on my cable modem, but it might as well be static as it only changes after there is a long term power outage. Also, it's likely if you're on a home connection most often, then you only have a limited pool of 32k or so IPs, which dramatically lowers the bits of information needed to identify you.

European ISPs (at least some) change your IP every day, including IPv6, unless you opt out from the router's configuration page, as a privacy feature.

Apparently tracking data of Europeans has a much higher market price.