Hiring for your marketing team is hard. It’s easier to assess the quality of a candidate for an accounting, sales or IT position. Engineers have to be great at math; marketers give you a bunch of words. That’s why Zappos CEO Tony Hsieh offers new hires $3,000 to leave the company. After the company’s intense four-week training program and a week on the job, Zappos makes what it calls “the offer,” $3,000 to leave the…