Hello,
in ye olden days, fleet strength, (number of fully leveled ships), was providing player with extra experience, +1% for each maxed ship.
Now, if the tooltip, that shows up when you hover over your fleet strength, shloud be trusted, it gives you a chance to get additional free cache, when you buy one.
So, my question is: what are your chances for getting free cache, for each point of fleet strength?