yeah i get your point but that’s not what i meant. i’m using VPNs to do google searches, for example, in incognito browsing tab. so google knows the 10k searches i did, but it cannot connect them to each other, as session cookies between them are deleted each time i close the browser (which is about every few minutes). and i don’t log in to any account in the incognito tab either, so it can’t use account identities as fixed points either. and it cannot associate the queries by IP address either.
edit:
after seeing this website … amiunique.org/fingerprint i get what you mean now. i have to think about this.