It doesn't matter. The ranks are supposed to be exponentially harder to achieve. The score is the square root of your poal score divided by 10. Anything else is a betrayal of math.
Oh that's right, pills are determined by mathematically defined levels, I forgot and was only looking at point totals. Damn. Purple and beyond will most likely be unobtanium for me, unless I make a full time job of it (not gonna happen).