I know this is going to sound naive, but why exactly would a ballet company have no other choice than to use the Overpriced Monopoly? Are there regulations placed on who can sell their tickets when they use a particular venue? Do they have no choice in the matter at all? Seems a little odd.
TicketMaster/LiveNation is essentially the only US ticket vendor (TicketMaster has managed to absorb most of its competitors). The person to whom I complained about my ticket snafu said that there simply wasn't any other choice but to go with a foreign company, given that the Colorado Ballet was struggling to meet TicketMaster/LiveNation's high fees.