Adding on to the discussion of ports, how about making interest rise on a time-based scale? For example, for the first 24 hours, the depositor would be able to accrue the default 0.01% interest. Then, as time goes on, the interest rate would gradually increase as long as no further deposits or withdrawals are made. It would make ports actually worth the large amounts of drones required to defend them. Right now, there's no point in depositing large amounts of credits into them, considering the steep rate of power creep we're currently experiencing. Essentially, we need a better reason to defend ports. (We also need a better way of defending ports, but that's already been said.)