OK, if this has already been asked or if there is a post for it feel free to delete me here (I looked but didn't see anything). Is there any true benefit to finding all of the posters? I'm taking my time with the add-on but can't get too excited about looking for all of them. If it's just a challenge for small XP than blah...cool idea, but I don't see an achievement for it nor have I heard of any particular prize or item.