Ahh, my time to apologise for my assumptions. I'm browser on PC/laptop first and rarely use a phone and never for Amazon. I also rock Linux on everything that I can, so my experience will obviously be different on "PC" too.

It really is not about attestation etc, I'm afraid. Its all about maximising profitability.

If you use a walled garden friendly device then you will be frisked inappropriately at every opportunity.