HF 19 had the 4 x multiplier on voting power so that people who only vote a handful of times per day could still have a good amount of influence. So it drains 2% of total power per 100% vote whereas it used to only drain 0.5%. I think it's on a 5 day cycle too so if you vote today you won't have 100% until 5 days from now even if you don't vote any more. (I could be wrong about that part..it may scale baste on a time waited calculation)