Back in 2012, a prototype for a game called Starbase DF-9 came out of Amnesia Fortnight, Double Fine's internal "game-jam". It proved popular with fans and as a result, the developer spent a considerable amount of time beating the prototype into a full game. Now, two years later, it's planning the final version and gifting the source code to the community.
Unfortunately, the community hasn't taken to the news well, with a majority of comments responding to the announcement being less than flattering. The general feeling is that Double Fine is cutting its losses and failed to communicate what its plans were. It also appears that version 1.0 won't have a great many of the features originally promised.
To compensate, the developer will release the source code for the game once the final version arrives, allowing players to craft "far-ranging mods that add content, new features, and change some fundamental game behaviors". Support will be provided, however, it'll be up to the community to produce "any new content for the game".
One user pointed out that the game's official site still has a "Buy Now" button, proclaiming the game is an "Early Access Alpha", despite the fast-approaching end to Double Fine's involvement (at least content-wise). While technically correct, it seems a little disingenuous on the developer's part.