My IPv4 address at home has not changed for over 10 years. My IPv6 address at work has not changed for 4 years (modulo privacy entension). I have not used any public hotspot for at least 5 years. Still Google greets me several times a month welcome on your new Linux computer. Yes, I use Cookie Auto Delete. But if they had had reasonable algorithms, they would long have learned that I never have their surveillance history when logging in.