HashNest has released a kWH prepaid card which is used for paying your maintenance fees.
The traditional way of paying maintenance fees is deducting the amount directly from your mining payout, however, there are users who prefer to retain their payout as it is and not use it to pay the maintenance fee, so we have finally come out with another payment method - KWH prepaid card.
To use, you will need to purchase KWH prepaid value on Hashnest website. How to purchase? The value from the card will be used deduct the maintenance fee from your KWH.
If the value is depleted, we will revert to deducting the maintenance fees from your payout until you’ve topped up your KWH.