[@Mega Birb] We don't necessarily have a limit. But there are only 3 positions for Knights in jail. Since the other 2 are reserved. 

[quote][i]3 positions open for the criminals in prison. If you choose to be a person in prison, your rank is a Knight.
The rest can be part of the organization or just joining. The ranks available to you are a Knight, a Rook, or a Pawn.
If you choose to be a Pawn, you are a new recruit.[/i][/quote]