IDs have no correlation to anything. You just have a heavy lack of understanding and resort to grouping individuals to ease the complexity because you simply don't have the will power for it.
ID's have a correlation to their user and when they bought the game.  I also happen to believe they represent the users intelligence.  And of course, the smaller your ID, the bigger your e-snake.
There is no willpower involved in sorting people into groups.  It's simply what you believe.  By saying that I resort to grouping individuals to ease the complexity, and that I lack the understanding to group them efficiently, you ironically suggest that you can group individuals based on their ID.  Figure out what point you're trying to make before you post.