Groupon has no viable business model
It's almost as if people derive personal satisfaction from poking holes in Groupon's success (or any startup, for that matter). Groupon has no viable business model, people will get tired of Zynga's games, Twitter can't monetize, Facebook will be killed by Google+/is useless/the ads on it aren't worth anything, etc. Every time one of these things gets pointed out, people show up and start high-fiving each other, say they've been saying this all along, etc.I really don't understand this part of human psychology. We cheer entrepreneurs on, until they see a massive success, at which point we feel compelled to point out that their achievement is meaningless and we knew it all along. Are people really that jealous?