The Delta contract stipulates they ALL have to have the costs of whomever is second lowest by a specified date. So, you had the bottom barrel GoJets brought in to set the bar, then they pull the Pinnacle stunt so they have a great benchmark to set for Compass, RAH, Skw and XJT. We all get set to Pinnacles rates. That's how they do business.
I agree, it just shows how shrewd Delta is and how long this plan has been in the works