Yet the ToS User Agreement states that any and all in-game items (amongst other things) are the property of SE and not the players themselves, therefore as a company they can release items again and again however they see fit, whether demand requires it or there is some kind of value in doing so. It also states the User Agreement supercedes any other agreements in the event of a conflict (in case of the image provided by Istaru)

Players have their memories what what they did, and considering all the other benefits of being a part of Legacy, should be lucky not everything was immediately made available to everyone instead.