The fact that I’ve had several not work on Amazon? Those things are weird as are the gift cards from the credit companies. Even within the individual cards where and how they’re accepted is inconsistent.
An Amazon Gift Card purchased with cash is the better bet.
For a debit card or linking a bank account to a payment method. Context clues chuckles.
My slim experience with picking Amazon shit up at other locations involved showing id to a clerk or doorman to gain access. That was a while back though.
Problem remains that your still going to a fixed. Predictable. Public location where at or from which you can be recognized or identified. After there is a record of you doing something potentially illegal (in the case of buying shit for bombs) but before you actually physically get the stuff. You can anonymize an Amazon purchase to to a certain extent. But not sufficiently for the press scare mongering to be any more valid. Not enough to prevent getting caught if it were a real concern (which it doesn’t seem to be). Attempting to make it so. Is a fair bit more difficult than acquiring your explosives without online purchases.
ETA: Beyond that have you purchased chemicals on Amazon before? I buy saltpeter for curing and a few other kitchen chemicals. Saltpeter is a gun powder component. And can be used as the fertilizer component in those fertilizer/diesel fuel bombs we hear about. In the US when you buy it. You’re supposed to provide a valid drivers license or passport (in the form of the ID number), name and address. And your name goes on a list of people who’ve bough saltpeter (its basically the same as buying psuedo-ephedrine). The package is marked as containing potentially hazardous materials as well. Now I’ve bought from Amazon sellers who didn’t do that, though I’m reasonably sure they were supposed to. And most of the chemicals involved in the article wouldn’t be the sort of thing that gets that treatment. I imagine sulfur might qualify as its quite flammable.