Let me offer an alternate explanation, based on speculation (but grounded in the realities of the booming SF realestate market): someone offered to buy out Borderlands lease for a ridiculous amount, and it was an offer they just couldn't refuse. So basically it was a choice between (a) struggling along paycheck-to-paycheck for the next 3 years, or (b) getting a nice fat check to close the doors and do something else. They chose (b). The Valencia corridor between 16th and 24th has exploded, with a large number of hipster restaurants and boutiques, and money is flowing in like crazy. Might as well tap into that while the going's good.
Expect to see some hipster cafe, restaurant or boutique opening in their place in the next few months.