Citi Bike’s week of bad news just got worse. After reports that the program was short tens of millions of dollars, and plagued with technical and maintenance problems, Citi Bike’s general manager, Justin Ginsburgh, has resigned. He is pedaling off to advise a construction firm. It’s not clear what’s next for the struggling, but popular program. New York City Mayor Bill de Blasio has said the city will not bail out the program, but it may allow Citi Bike to raise membership fees.