I was obsessed too. In the end I realized that the top ranked 200 players or so are ranked carefully, for the draft (those players have grades of 9.5-10). PGstaff himself, when he still posted here, admitted that.
Everyone else's rank seems to be determined by an algorithm based on the data they have on the player - FB, performance at tournaments, where committed, etc, and is completely meaningless.
@ABSORBER posted:But for those that have the means and the desire, there are many intangibles to be gained by attending--learning how to deal with pressure, feeling comfortable with showcase formats, seeing your peers and understanding where your current skillset fits and what you need to improve, etc..
I agree with much of what Absorber is saying. But not this; paying $800 to learn how to deal with the showcase format is not justified. There are many other places you can do that for much less money.