FREE SPIRIT members now have a new way to earn miles. The airline has teamed up with Mall Networks to develop an online mall for frequent flyers. The mall is expected to be up and running sometime this spring and will feature over 400 merchants, including JCPenney.com, OfficeDepot.com and Lands’ End. All of the legacy carriers currently offer online shopping malls, but Spirit Airlines is the first low-cost carrier to launch an online mall.