Of course it is based on mututal trust..we are expected to pay the full amount and the users are expected not to spam or abuse the point system. As far as the payment method to people in nepal goes, we haven't found a good methond...Somebody mentioned in another forum "Since Paypal is not here in Nepal, you have to register via another country and address, or you can use address of anyone you know who lives outside... which you can change later..."