Why is there a cost difference during the payment? or Why is there an exchange rate for Cryptocurrency?

Lunu does not charge consumers any fees to use our services. However, in the course of a transaction, the exchange rate is defined by a pool of independent Arbitrators. Lunu’s Processing algorithm automatically chooses the best deal from an Arbitrator for cryptocurrency conversion. It can be slightly higher or lower than the exchange rate, provided by the customer wallet, but the amount in cryptocurrency you should pay is the same in Crypto and the customer will not lose any money.