Btc and other miming facilities get paid. Because they maintain the network secure. No question on that. For those systems lot of electricity is used to decide who get the chance to process the transaction. In here that deciding is done according to people voting so we get paid for keeping the network secure and because of that, coin has a value. For human labour. From where does money come from to btc, even though each block produce 25 btc out of thin air, its buying and selling power.