Diane,
What is the basis for your statement that "airlines have to pay to be included in that service" (RAC)? I know there's been speculation on this board for years that the airlines pay for RAC, but I've never read anything factual that indicates that any company other than Disney is paying BAGS Inc. to operate RAC.
I honestly cannot believe that United or American would have agreed to incur any "net new" costs to become part of RAC in 2005.
Here's what I wrote recently in another thread about Southwest and RAC:
The launch of DME and RAC was four years ago, which was long before airlines such as United and American had fees for normal checked bags.
However, airlines such as United and American were desperately cutting expenses. United was operating under Chapter 11 bankruptcy protection, while American was doing everything they could to avoid the same fate (they were successful). American even eliminated pillows in domestic economy!
If United and American had faced any net increase in the cost of providing checked baggage, they would not have signed up for RAC. Anyone who really thinks that United and American are subsidizing Disney's RAC program is unaware of the state of the airline industry in 2005.
Please note that I wrote, "any net increase." United and American might have been willing to pay a small cost to BAGS Inc., if, and only if, it corresponded to savings elsewhere that exceeded that cost.
In contrast, Southwest Airlines made a healthy profit in 2005.
The big difference is that the legacy carriers who participated in RAC from day one all used industry-standard software systems and networking that allowed interline connections and interline baggage transfers. BAGS Inc. leveraged that system. Southwest had its own proprietary system, built around how Southwest does business.
Even if neither BAGS Inc. nor Disney expected any per-bag fee from the airlines, Southwest faced an interface issue (and associated costs) that the other airlines did not.
Saying that the current carriers who participate in RAC are willing to pay a per-bag fee, while Southwest is too stingy, is giving the other carriers too much credit.
Arguably, Southwest is more committed to quality service than any other U.S. domestic airline.