As far as I understand, you offer us to use the services of an intermediary service. As for me, this is not a good idea, and it seems to me to be not a very convenient and safe method of payment. I will wait for the time when it will be possible to make purchases on Amazon directly without intermediaries. I believe that this time will come. Albeit in a few years. In the meantime, I can easily use fiat money. I hope that the year 2019 will be held under the auspices of the introduction of cryptocarrency into the real world economy. This will be a real breakthrough for the crypto-market.
In my opinion Amazon or eBay or another giant of e-commerce industry don't wanna risk own reputation and they not gonna change things dramaticly.
They in any case have their profit.
They start accept Bitcoin only from moment when realise that they can earn even more profit with cryptocurrencies and projects like Bistore.tech and any other work successfully and people realy use them a lot.
I will be very happy if this project will helps to speed up cryptocurrencies implementation in everyday people life.
I believe that this time will come
I think the breakthrough will happen is when Bitcoin becomes more mainstream and merchants keep the bitcoin rather than instantly exchanging it for fiat. Whenever there is an exchange there is a small loss in value. The change is most likely to happen in a bull market rather than the current bear market.
Customer pays merchant -> Merchant charges premium price for accepting bitcoin -> Merchant exchanges using a third party exchanger at a small fee for fiat at a sell exchange rate. (loss of value)
Customer pays merchant -> Merchant prefers Bitcoin -> Merchant keeps bitcoin (store of value)
The ultimate change will come when more people retain bitcoin as a permanent store of value. This requires more mainstream acceptance of Bitcoin as a good store of value.
This will happen when a more longterm holding pattern has been established. It will improve with each halving of the mining reward.