This is the note I sent to them through their "Contact Us" portal:
It was recently brought to my attention that Groupon does not support the 2nd Amendment by pulling coupons and ads for pro-2nd Amendment businesses. I have a small business and was actually considering doing a Groupon. This will not be happening now and I will be using different social networking channels to let thousands of people know how Groupon does not support or recognize pro-2nd Amendment companies. I know Groupon is not in the best financial situation and had one of the worst IPO starts in the history of the stock exchange. This decision to not support law abiding citizens or businesses will only hurt Groupon's future and not help it. Good luck!