1. You trust every ad comes from "google"
2. You think ~everyone/most have ISP-NAT (hint nearly ~no one has it and IPv6 is a thing too (hint 2. those are 38% worldwide))
But you care about uniqueness because of ad-blockers who are used by ~40% of all users, but a IP is "not" unique, nor the browser, OS, resolution and GPU and the combination of all those factors, but NONO the Adblocker is the problem.
IP are also constantly changing, at least once a month. For sure, they can't rely on one identifier, which is the IP address, because after it changes, all of the data is gone.
Also, you say things I didn't say. I said THE IP is not a really good identifier, but you also say I meant also other identifiers.
The IP can't survive on its own. The algorithm needs more than just one thing. It needs multiple things while if one is not applicable then we get another one.
An ad blocker already eliminates you to 40% of the internet users, which is a lot.
I don't know from where you have that one sided information (maybe you life in a bubble), but my IP changes never until i leave the router powerless for more then 12 hours.
>An ad blocker already eliminates you to 40% of the internet users, which is a lot.
No it's not, but your screen-resolution combined with GPU combined with OS combined with Browser(Version) combined with Cam/Mic combined with ~location is.
I guess it's company dependent.
> No it's not, but your screen-resolution combined with GPU combined with OS combined with Browser(Version) combined with Cam/Mic combined with ~location is.
You said it yourself. 40% of all users use an ad blocker, hence when you use one, the website will know, and you're part of them.