Have you ever bought a game of the year edition game? People will buy a game plus expansions over time spending upwards towards $100 So like a year after a game releases or 2 depending. The company makes a lot of money off it and its DLC. Then they release the same game plus all dlc for the original $60. This happens all the time. They are selling Vanilla+1&2 for $40. Then TTK for $40. Then with all things a Collectors Edition will come with extra stuff for people willing to shovel money towards it.