I mean, the ad services plugged into every website have already cross referenced each other and know who you are even if you use a service like DDG that supposedly doesn’t track. Incidentally, Kagi supposedly doesn’t track either, (which they’d better not since you’re paying them), so while it doesn’t mitigate the above issue of your being traceable by pure virtue of browsing the web, it certainly isn’t “tying your porn results to credit cards and search results.”