I'll explain.
At the beginning of a season, the entire roster at that time is given numbers. Each number represents a certain superstar. From that point, it's up to the members to pick a certain number of numbers (usually 3, based on division, show, etc.) that they will keep throughout the season. For example:
You are allowed to pick 1-40.
I pick 7, 16, 38.
I get the following wrestlers:
Zasalamel
Zach Bronko
Solomon White
Now, based upon the wins and losses of those specific characters, a member will gain points. The member with the most points at the end of a season wins and thus, gets some form of a prize, as do the second and third place finishers.
Things that can affect the number of points a person gets are:
Draws
Championship Matches
Main Event Matches
And so on, as they count for more points than the rest.
If at any point one of the superstars you picked is dropped from the roster, you can pick another character that hasn't been assigned.
Furthermore, numbers may be swapped at the beginning of a season if you are not happy with the characters you get, but that is on a first-come, first-serve basis.