It's a lot of factors here.
1. Monday morning, is probably the single busiest time of the week for business travel
2. As mentioned, it's getting to the end of the year so people are burning certificates
3. The later it is in the year the more DM's there are going to be as more and more 1st time DM's are qualifying every day, and those who won't make it haven't dropped yet
4. October historically has been a very busy business travel month. Everyone is done with vacations, and there are really only 45 or so business travel days left in the year. Not many business flights the week of Thanksgiving, or after mid-December, so if there are meetings that have to happen before EotY, it's right now.