Yeah you've been able to buy gift cards with bitcoin for amazon for a while now.
Bitcoin is being scrutinised by governments more than physical currency atm so that is probably the biggest problem that amazon might face, I gave up buying something with btc a while ago because I like using it as it's fast, secure and fairly easy (compared to putting in card details) but then the payment provider wanted kyc...
TTh last bull run also had a lot of rumours of amazon accepting btc, which then turned out to be ffffalse-if implemented, I'd expect it to be released in a few years unless they've already got something wworking which is probably