Things that make you go hmm: The Mavi Store

Several years ago, Mavi laid down roots on Broadway between 12th and 13th St. in New York. Since its opening, I can't ever recall seeing someone that wasn't an employee inside. With rents constantly rising and even decently successful businesses folding, how on earth does this shop stay open? Is it a money laundering front? Is there a heroin den in its basement? What's the Mavi deal? I don't get it. Hmm...