Bitrush uses its own price based on the supply and demand at the moment. Our margins vary between 1 and 2 % and depend on the market.
Apart from our margins there are fixed costs of the minersnetwork for the transactions of coins (so called minersfee) that we build in our prices.
The price you see when placing an order are always all-in. The minersfee and our margin is included in the price. This makes that you pay relatively less when buying greater amounts at the same time.