HMM: Lyft Says Ditch Your Car (and Ride in Ours), Teams with Carvana Used-Car Buying Service. “Lyft has brought back its ‘Ditch Your Car for a Month’ program and has doubled down by teaming with Carvana to suggest people ditch their cars forever. Last year, Lyft gave 150,000 people in 35 cities some free ride credits if they promised not to use their car for a month. This year, you actually have to sell your car to Carvana in exchange for the Lyft benefits.”