After recently starting to use them again I'm blown away at how useful and engaging the app is. But the revenue just seems to be hobbling along considering their scale.
They've tried so many models and none really stuck like AdWords for Google. Long term I just don't see the same kind of revenue growth that companies like Google and Amazon have had and continue to have. For any investor in public companies that's kind of terrifying when it's not clear how revenue will grow.