Hashing 24 Terms and Conditions clearly state that they will charge a daily maintenance fee AND if there is not enough BTC in your account the contract is cancelled. So if you do not mine enough and you are not carrying a BTC balance you could blow your contract. This works in a similar manner to Genesis Mining where they can terminate BTC (Forever) contracts when it becomes unprofitable; however, given I monitor the crypto market I know if my GM contract is at risk - with Hashing 24 it is not so clear regarding the maintenance fees (which are unstated).

GM remains clearly my preferred miner; however, I would like it you had the option to hold payouts until there is a reasonable amount in your account. Receiving small amounts is not a problem it is when you withdraw these as a lump it is more expensive to transfer 1000 x 0.001BTC than 1 x 1BTC because the hashing power required is greater on the first. This could seriously dent your profits.