Then you could also have mesh network built into devices inside your WiFi connecting to similar devices.
And my favorite for right now, and the thing I finished my last response with, your phone.
Your phone is most likely unique, between the device id, your carrier, location, other apps, contacts, operating system, etc. I personally assume most large websites could find you in minutes.
That asked about their phone SPYING on them. So I’m taking this at face value and assuming more than just targeted advertising.
Block all the IPs you want, you can’t block a Stingray
https://en.m.wikipedia.org/wiki/Stingray_phone_tracker.
Then you could also have mesh network built into devices inside your WiFi connecting to similar devices.
And my favorite for right now, and the thing I finished my last response with, your phone.
Your phone is most likely unique, between the device id, your carrier, location, other apps, contacts, operating system, etc. I personally assume most large websites could find you in minutes.