If I remember correctly, the normal pay schedule is followed. As an example, shoppers should receive payment on Friday, December 13th for the previous shops performed.
But then, another payment will be sent out usually a week or so later for shops performed in the first 2 weeks of December (1st - 13th). So, a payment should be sent out on December 20th.
Shops performed after that week (December 14th - 31st) shall see payment in the first week of the new year.
I believe Maritz shuts down or has a skeleton crew manning the phones during the last 2 weeks of December.