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.
Utrust is like Paypal, and will behave similarly as paypal, but with cryptocurrencies, and fiat money of course, but to be implemented in amazon, Amazon itself must be the one implementing the utrust online wallet, they already accept paypal, but it was decision of Amazon to do so, the same is with Utrust, companies, and websites must choose utrust as a way of payment.
It will need time for Utrust to be used by amazon and similar sites. If in the future Utrust gain a massive attentions as a payment method, I bet more and more places will apply it.