Even if you log out don’t they still know who you are based on IP or other fingerprints to serve relevant content? Anecdotally I’ve been on online shopping sit

Even if you log out don’t they still know who you are based on IP or other fingerprints to serve relevant content? Anecdotally I’ve been on online shopping sites that will email me my cart to ask if I want to check out even when I’m not logged in, so it seems unlikely that you’ll be any more anonymous by signing out.