4. LivingSocial
LivingSocial, a daily deals website, has trailed Groupon since it launched. But this is an industry in which trailing the leading company is a very bad sign. As the financial troubles of Groupon demonstrate, the online daily deal industry started to fall apart not long after it began. Groupon’s share price, which reached a high of more than $26 after its initial public offering, was trading as low as $2.60 last year. While the stock is up on improved sales, the company remains unprofitable.