I understand the 'Organized Extortion Kick Up' but it can cause tremendous resentment if all the made guys have to kick up 10% for no real reason to a guy sitting in a big fucking house removed from everything. That's the fastest way to get killed.
in Chicago, The Top Boss had his OWN crew. He was partners with all the made guys in his crew and all the other crews were partnered with him and his guys in one way or another.

For example: The Boss's Crew would own the Company that manufactured the Poker Machines. The other crews would have those machines in their areas.

Another example: All the crews would run Bookmaking, but they would all lay off their bets to the Top Boss's Crew.

Another example: The Boss's Crew would have the best Political Connections so other Crews would WANT to partner with the Top Crew so they could have maximum protection.

Another example: Crews would work together on murder.

Another example: The Bosses would put some of their money out on the street in partnership with other made guys and expect a certain return.

The Top Boss of the Outfit had the Strongest Crew and best political connections. All the other crews would be partnered with him and his top men in one way or another for different but LOGICAL REASONS.