It turned down a $6 billion acquisition offer. It wants a $25 billion initial public offering. It more or less created a breed of advertising that now every company wants into. It's grown faster than just about any company, ever. But according to multiple signals across the Web, things may be afoul at Groupon.
The latest is a chart released by Yipit, a start-up that aggregates cities' daily-deal offerings--more than 400 sites' worth--into a customizable digest that highlights individual users' preferences. Yipit said in a blog post today that it found a 32 percent decline in Groupon revenue per … Read more