Totally agreed here. I have seen too many articles lately that examine Facebook's strategy and business model based on the present. FB has been extremely agile

Totally agreed here. I have seen too many articles lately that examine Facebook's strategy and business model based on the present. FB has been extremely agile for a large company, and they have proven this fact again and again. They are not afraid to throw things away and try new tactics. Even if they aren't doing well with their ad system right now, there is a big chance they will stumble upon an even bigger goldmine through their concerted and iterative effort (ie. Zynga + social gaming).