The author of the post seems shocked that he's in violation of anything. Perhaps he'd like to share excerpts of his lease before he feigns such shock.
Come on, the guy lives alone in a 3+ bedroom apartment in Brooklyn. We all know he signed that lease specifically to run a pseudo-hotel business under the guise of an Airbnb profile. He whines that he can't afford to live in the New York rental market without roommates; so get roommates or move somewhere cheaper.
BTW, the author is a professional writer who (gasp!) has a brand new startup to plug.
edit: It sounds like this guy has a sincere love for the experiences and newfound social life he's found when acting as an ambassador for his city. His heart is in the right place. He would make a great Couchsurfing host and probably make even greater, long-lasting relationships.