I was checking the dates for upgrade card usability for dates over the next few weeks to make sure I wouldn't run afoul of something over MLK Day weekend (I didn't think I would, but stranger things have happened). As far as I can tell, the only blackout dates still applicable in 2020 are over Thanksgiving weekend.
Note that the 2-for-1s are still subject to the usual volley of them, but I found it quite interesting that the upgrade cards can now be used effectively "whenever".
Note that the 2-for-1s are still subject to the usual volley of them, but I found it quite interesting that the upgrade cards can now be used effectively "whenever".