[Tk79]

When I talked to my rep, I got the idea that it wasnt automatically adjusted by the number of hands you play. He told me if it looked like I was going to be way above or way below my goal to email him mid month sometime and we could adjust the goal. I didnt have a chance to do this as I passed my goal by exactly 4 raked hands.

You could ask Microbob though. I think that I remember him going into more detail about this in a thread once.