I'm guessing that's what the devs had in mind, but they weren't thinking about it correctly. I encourage you to work out the math with and without the 1/100 and see if your total vote influence is higher in either case. You'll find that in both cases, your total influence is the same, and doesn't depend on how much you vote at all. (as long as you keep your voting power strictly below 100.)

The whole point of this is that your vote doesn't need to hit zero for your voting power to be limited. It is limited by the rate that voting power "drips back into the tank," not by the fact that your power hits zero.

Don't worry, I didn't get it the first time around either. But just remember: it doesn't matter how much you vote, how fast it decays, or anything. It only matters that the drip into the tank is constant.