Why is the network fee changing?
Network fees for a Dogecoin transaction are paid to miners on the Dogecoin network, for a Bitcoin transaction, network fees are paid to miners on a Bitcoin network, etc. These network fees depend on the size of your transaction in bytes. Since transaction size varies greatly, network fee can also be different.
On average, our users must pay network fees equal to 1 DOGE per Dogecoin transaction, 0.00002 BTC per Bitcoin transaction and 0.001 LTC per Litecoin transaction.