a couple of weeks ago on twitter
he said there are restrictions set by USC - However, the NFL requires the that the home team in the international series stadium must be available should the international stadium not be available.
My guess is that USC is on the Thanksgiving break on Monday night - therefore allowing this game to be played.
The same is likely true for the Rams v Eagles on Dec 16th
Farmer said that the reason Hawks @ Rams, and Packers @ Rams weren't scheduled for SNF was because it was a school night for USC. That does not explain why the Saints v Rams in New Orleans did get scheduled from the get go <shrug>