“Space Junkies, the multiplayer VR shooter, cost $40 at release and remains available for sale on Steam, with no notice that it will be rendered unplayable in two months.”
Ubisoft is shutting off online features for Far Cry 3, Assassin’s Creed 3 and others on September 1. The DLC you paid for goes with them. Space Junkies is still on sale for $40 and will stop working entirely. You never bought these games. You rented them until Ubisoft got bored.