My guess is that the Ace Ticket sales reps on the phone get a commission, and that Ace Ticket purposely doesn't include the seat numbers online so that you have an incentive to wait until they're open and call the sales rep on the phone.
What is 'Collective Bargaining'. Collective bargaining is the process of negotiating the terms of employment between an employer and a group of workers.
One of the most important tools in a union's toolbox is the right to collectively bargain with the company. Mary doesn't negotiate with her employer on her own. Instead, she's a part of a group of employees, called a collective bargaining unit, that engages in collective bargaining.