does anyone know if that 5 pack for 3.99 is game plus dlc or just 5 copies of the game?...if the latter why would anyone buy that?
It's 5 copies, 4 you can gift (I believe just 4 you can gift. I've heard complaints it doesn't work well if you already own it).
This is a common thing on steam with multiplayer games. You can buy in bundles which gets you 1 copy for free and allows you to gift to friends.