Piixpay exchange is different from exchanges that can be bought or sold directly from other currency traders. It works exactly like the money changers we go to in our city and prepare the currency of the destination country for travel. Our side is the exchange itself.
In my opinion, such exchanges are needed for cryptocurrencies. I have seen in some exchange offices that other users are abusing and setting wrong prices and cheating the buyer. But when there is a secure exchange and a single party, we can safely sell our bitcoins and ethereums to it.