Actually they have no real obligation to do anything, kickstarter is a tool to kickstart "something" , do not get mistaken into thinking it's a list of everything that has to be done in that specific order under a "law", projects changes and so do goals, perks etc... , the only obligation is that the final product be released, before kickstarting anything on a project at any level, understand what you're getting into.
The T&Cs that applied when Frontier Kickstarted this said -
Project Creators agree to make a good faith attempt to fulfill each reward by its Estimated Delivery Date.
Kickstarter does not offer refunds. A Project Creator is not required to grant a Backer’s request for a refund unless the Project Creator is unable or unwilling to fulfill the reward.
Project Creators are required to fulfill all rewards of their successful fundraising campaigns or refund any Backer whose reward they do not or cannot fulfill.
Quite clearly people are entitled to their rewards, or refunds. Understanding what you're getting into is good advice, the terms and conditions were there for just such reassurance. Obviously if FD went bust, it's a different story but they're quite happily going on developing the game, and earning more money, without satisfying their Kickstarter obligations.
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