I like the beating heart... I finally have an accessory to go with my Mola Ram Costume! :O
Seriously, Holiday cross-shard trading has slowly been dying these past 5 years. The real golden years were 1999-2003, where they had large collectable sets and everyone was trading. It was rather fun.
But the problem is, if you'll look at the Christmas Presents in past several years, they've stepped up the quanitity and really dropped the quality (in terms of collection variety). This year's gift set is a perfect example: there was nothing varied, no collectibles. You could use your account stable to get one of each, there was really no reason to get more. There was no prize "rare" version of the prizes, like before. In short, they've slowly morphed it into a complete set is attainable by one account.
I get the feeling that the whole holiday trading thing was kind of like the stealable items in crates -- the devs didn't plan on it, but it was a serendipity that turned into an attractive bonus to players. But I think they've long been aiming to phase it out.
BTW Mountaindew, where ya been? Havent seen you at the guild functions in a bit...