>"Land rush. There may only be room for one coupon site in the minds of people" I agree this is a likely explanation, but is there any evidence this is the cas

>"Land rush. There may only be room for one coupon site in the minds of people" I agree this is a likely explanation, but is there any evidence this is the case? I can understand that limitation for a social network, and even for a search engine, but not as much for coupons. I don't care if my dead tree coupons come from several sources, would I care about coupons that show up in my email? I can see two areas of competition, anyway - geography and industry. I suspect targeted coupon sites will always have a fighting chance against more generic ones (Groupon is probably trying to be both, of course).