Also amazon wants to accepts the bitcoin because they are getting a big company and they are also seeing that lots of people are using the bitcoins
so they cant leave behind
it is not about leaving behind,amazon as a business doesnt feel the need of having bitcoin as a mode of payment at this moment as they are offering many other options for payment and more over the price of bitcoin is not stable and being a big business provider the risk is higher which could end up in huge loss if the price of bitcoin is to go down.