[zurttall]

Amazon cannot see the mac address of your router. They can't even see the mac address of the device you're using (maybe they could if you installed their app).

Amazon is doing something different to track the user.

thank you. Can you elaborate what they do to track the user if you know ?

Tbh I haven’t got a clue. But a quick google search will show that websites cant see users MAC.
Amazon surely uses cookies.
Considering they are a FAANG they likely use some sort of machine learning algorythm on anything the user does (any click the user makes basically) for analytics and anti fraud purposes.
If that’s the case they know what “scammers” usually do when creating a new account because they have analyzed tens of thousands.
They even sell this kind of tech

Thank you