Would have to say the pay, we do the same routes and service as our codeshares. American, United, and Delta. Yet we are referred to as a regional airline. If our routes and service mirrored actual regional service that would be one thing. However, we do 2-3 hour long flights with meals and several beverage services just like our mainline codeshares, but we are paid under half of what mainline starts out with per year. I guess it would just be cheaper to keep us contracted as a regional for cost cutting purposes as they slowly introduce more of mainline into our work routine. It's a sneaky way to save money, but business is business.