Google reportedly offers $6 billion to acquire Groupon. This is almost twice as much as Google's largest purchase to date, the $3.1 billion it paid for Doubleclick in 2007. http://news.cnet.com/8301-13577_3-20023978-36.html
The study found Groupon promotions were profitable for 66 percent of the businesses surveyed for the study, but they were unprofitable for 32 percent.
More than 40 percent of the respondents indicated they would not run such a promotion again. http://www.media.rice.edu/media/NewsBot.asp?MODE=VIEW&ID=14811