Personally I am not sure there is no cross over..........
Below is a line from an email Voluxis sent to an aircraft owner who is with another management company.
"I believe that Voluxis and the other Mountfitchet Group companies (ACS - the world largest brokerage, and Interflight Aircraft Maintenance) can offer an unrivalled level of resource to aircraft owners"
I would interpret the above as ACS will use your aircraft for charter flights as much as possible. I cannot believe if ACS get a request for a flight and another broker goes to Voluxis for the same request that is not flagged up on the basis they are telling owners they will have "an unrivalled level of resource" I can't imagine management would be pleased if they lost out on two bites of the cherry with another broker booking their aircraft when they were quoting the same flight!!
Here is my hypothetical scenario, ACS get a flight request, check with Voluxis what is available, Voluxis say 2 other brokers looking at this one. ACS then go out to market check pricing with other operators, go back to Voluxis saying we need to do at this price and will get flight (and might ask what the other brokers were quoted which I am sure will be the same as ACS get it for!!!). Commission for ACS, revenue and profit for Voluxis. The question is are they discounting their quoted average rate to owners to get the business.