I haven't looked at the numbers you are seeing there, but often theres a lot of people who pick up open time in the 48 hour period in order to get other days off. Especially in December, when a person might pick up a two day trip in place of an out/back on christmas for example.
Even with that said, I completely agree with leaving open time 'open' when we have guys on the street. BUT, you gotta remember that mgmt failed to create a voluntary furlough (which we had in 2008), so the fact that our fellow young pilots with families who really need the money are spending this holiday season on unemployment is just as much on management's hands as anyone who is picking up open time.