If you still have some older sets to purchase from LEGO [email protected], you may want to know that the new 2015 promotional polybags are now available as of yesterday and they do stack.
You can get a FREE LEGO Star Wars At-DP (30274) with any LEGO Star Wars purchase during the month of January. For the FREE LEGO Creator Flower Cart (40140), you need a purchase of $75 or more in your shopping cart. Finally, for the LEGO Friends Mini Golf (30203) polybag, you just need to get any LEGO Friends item.
I tested it with a larger set that I know will cover the criteria to get both the AT-DP and Flower Cart polybags and threw in a random Friends set and sure enough, they all show up in the shopping cart.
If you don’t have anything left to purchase this year, I would hold off one more day when all the new 2015 sets will be available tomorrow. Thanks to Chris for the heads up yesterday.