Monkey Parking today said it will keep offering a way for people in public spots to sell their spot to another user of the service before vacating it, something that has typically been an open market for any nearby driver who happens upon it. Earlier this week, San Francisco City Attorney Dennis Herrera sent out cease-and-desist letters to Monkey Parking and two local startups, warning them that that handoff between drivers was illegal and could net up to a $300 ticket. According to the Associated Press, Monkey Parkings CEO Paolo Dobrowolny views Herreras order as a misapplication of police code, and believes the companys business model is protected by freedom of speech. Dobrowolnys company and others like it have argued that the service improves traffic congestion while cutting the amount of time people spend hunting for a spot, both things the city has argued make it predatory. Herreras letters to Monkey Parking earlier this week warned of legal action if the company did not stop its operations within San Francisco by July 11th.