So I have been keeping up with the expansions from the beginning. but recently my kids decided they wanted to play so they both started out on the F2P version. The other day their aunt found the "new expansion" at a store and got them each a copy. When she dropped them off I found out that she had purchased two brand new in plastic versions of HoT I know HoT is now included either in the base game or PoF but not sure which. So with all that said can someone tell me if there is anything to be achieved by adding keys to the F2P version of the game?