Companies face entirely disparate problems at different scales. Let's charitably give App.net a valuation of $20M, and take FB's valuation as the approximately

Companies face entirely disparate problems at different scales. Let's charitably give App.net a valuation of $20M, and take FB's valuation as the approximately $42B the market says it's worth. This isn't even apples to oranges - it's 1 apple to 2100 oranges.