Do I have to pay additional? How often I have to pay? You pay just once for any contract.FAQ: Do I have to pay additional? How often I have to pay? You pay just once for any contract.
Fixed-term contract:
You pay for a 12-month contract and get mined Bitcoin for a year without any further payments;
Open-ended contract:
You pay only one time, but please remember that the maintenance fee will be deducted from the mined amount.
Shall the maintenance fee be higher than the mined amount, only the available amount from the daily mining will be deducted.