Some big names in tech don't believe that the FCC's net neutrality rules do enough to keep internet providers honest. A group of dozens of companies and advocacy groups (including Etsy, Foursquare, Kickstarter, Mozilla and Reddit) has sent a letter to the FCC asking it to publicly investigate the practice of zero rating, or exempting services from data caps. While the strategy isn't strictly illegal, the alliance is worried that internet providers are using zero rating to make an end run around net neutrality. After all, the ISPs are favoring certain sites over others -- you may be less likely to try that new video service if it cuts into your data allotment.