DownWithBaradDur If you use a VPN, amazon still has ping time, can probably guess your type of connection based on packet characteristics and can probably guess your country based on that.

Your network career may be instantly selling information about the packets going into it's network, which someone may buy also to help get information about VPN users.

You also never said if you installed the amazon app into a profile that you had used with a different App linked to your identity, in which case your phone identifiers have already been sold amazon and to data brokers. Even if there was no Amazon App in that profile, an App linked to you is likely to sell your identifiers unless it's open source and even then it depends on the code and may sell anyway.