The minimum payable amount for a staking period is $10 USD equivalent in ETH. All unpaid balances will roll over to the next period. This amount is subject to change based on Ethereum gas prices.
All fees earned by IDEX are taken either in the token being traded or in ETH. Tokens that have at least $50 in value and are able to be sold on IDEX will be liquidated into ETH within 12 hours of the end of a payment period. All other tokens carry over to the next period.
At the end of the period, fees (in ETH) are automatically distributed to users' staking wallets within 48 hours. Gas fees for sending payments are taken out of the total payment for that period.