This article is of negligible value and not sure I found any "dirty secret" contained, but the title did make me click. Summary: (1) Marketing tactics are not

This article is of negligible value and not sure I found any "dirty secret" contained, but the title did make me click. Summary: (1) Marketing tactics are not always effective. Groupon is a marketing tactic, and like other marketing efforts, it is not fullproof. (2) If you give 50% off to customer and 25% to Groupon, you may not make money.