What about payment, will it work with mainstream ecom sites like Amazon etc?
It potentially could. Amazon is already going to implement Bitcoin in October. Utrust could just handle the conversion of tokens/currencies on the fly.
I heard it was just unverified rumor but I do believe Amazon will follow the online retail giant Overstock at some point. Nevertheless, I hope the rumor becomes a reality come October.
Amazon is for business and for profit and now that the Bitcoin and cryptocurrencies are gaining more and more attentions, it is not that far from reality, if they see that the cryptos will be more profitable, then, i guess, they will go with them.