Disclaimer: I am basing this on very few data points so if you have information to refute, please share.
Background: In my most recent draft in Gibson, I had 10 mil in college scouting and 6 in high school. Because of the low budget, I did not see the full 500 players. 95 players showed up as ???. Now of those 95 players, I saw 13 C, 7 1B and the rest were all pitchers. The players were intitally ranked as all of the ?? pitchers, followed by the ?? catchers, and finally the 7 ?? 1B.
Theory: The players were ranked by their true potential even if I only saw them as ???.
Backup: I looked up the round the ? players were drafted in and listed them in order as they appeared on my rankings:
Pitcher: 4, 1, 4, 1, 7, 1, 4, 8, 13, 12, 2, 9, 6, 19, 14, 23, 10, 11, 5 (after this no one was taken before the 5th)
Catcher: 2, 7, 6, 6, 19, 21, 18, 19, 20, 18, 20, 22
1B: 1, 3, 22, 17, 19, 23
So what does it mean? First, it could be a coincidence, but based off these data points it would appear that the ??? are ranked in some order. I'm not sure there is major use here, but if you had zero's in both of your scouting and you were walking up to a total crap shoot of a draft, maybe consider bumping up the first few ?? at each position?