If I understand correctly, the explanation is simple: all one has to do is deposit and hold it on their balance, and the reward will be calculated based on their period of holding.

My question is, since it's nothing like staking, if one
decides to deposit today and can't be patient enough to wait for a full month, how will the reward be calculated? Will there be no reward for such a depositor?

Will there be any form of fee deduction or what so ever? I can't see any information regarding fees here. I know if one wants to withdraw back to an address fee needs to be charged to cover up the transaction, that's the not fee am asking of.