Poshmark belongs to the ranks of companies that speak to a missing element in the labor market. Few jobs offer the desirable combination of a decent wage, flexible hours, and the ability to be one’s own boss. Poshmark seemed to offer one answer—an easy way to set up your own shop and, as a 2013 press release noted, potentially start generating $20,000 or so a month. But as Petersen discovered, there was only one problem: the hours.