I guess that anything Bremont send out will be based on how well you're know to them and what relationship to the company you have. Something like the Christmas gift will be limited in numbers and I couldn't tell you the exact criteria but I would imagine that the following are factors;
Do you visit the boutiques on a regular basis and have a good relationship with the sales staff?
Do you visit the open events when they're on?
How often do you buy a Bremont, when was your last purchase. and did you purchase from a boutique?
I got a Black Bremont tshirt when I got my Lancaster last Spring.
It's a bit big but I do wear it.