It looks like Potato sack owners get yet another item: the companion cube pin under a different name.
I liked what they did with the Rift and Shogun items and give out Genuine versions to those who order and unique ones to the store and drop system. I don't know why the Homefront hat doesn't, maybe because it wasn't released in the UK? I hope the potato hat gets a unique version.
I know Valve likes their store and their in-game economy but I am a little frustrated with their monthly promos. I enjoy collecting hats but I would rather see TF2 promote a game by giving everyone that hat to raise awareness of the game. (I had barely heard of Rift when the crossover was announced.)
I just want every hat/item without using a micro transaction store. Then I wouldn't have the headache of trading for things.
I would buy the potato sack if I didn't already own 4 of the games. Also, sadly, I'm a bit of an achievement whore and some games like Super Meat Boy, Audio Surf, and Bit.Trip have some ridiculous ones. I've enjoyed them more when playing on a friend's account anyway.