Rialto & Ticketmaster

Is it normal for Ticketmaster to come in and snag every single ticket at the Rialto for an event? Went down to the box office today because every ticket reseller had tickets for at least twice face value. Got there and the Rialto staff said that Ticketmaster came in and cleaned them out within a day of all the tickets to the Pixies in September. Saw them last year in Phoenix and even with Ticketmaster only paid $60 for them. Now the cheapest seat available is $135.