Despite its difficulties since hitting the stock market, Groupon remains hungry for startups to acquire. In the first nine months of 2012, the daily-deals giant acquired eight venture-backed companies, making it more active than Facebook. Groupon’s senior vice president of corporate development said the company is focused on purchasing companies that help it improve and expand products and experiences offered to merchants and customers. FeeFighters, which enables businesses to compare credit card processors, is an example of what kinds of target companies Groupon is looking at these days. (WSJ.com)