If you are a Facebook user, have you noticed any changes lately? For example, sites that used to show up regularly suddenly disappearing? My wife mentioned this a couple of weeks ago, and after she said something, I started noticing it myself.
Then, today, my brother sent me a link that explains everything. I forwarded it by Email to a few friends, and they had noticed it, too. Here is the link that explains what is happening.
It appears that Facebook has gone full bore stupid in search of additional revenue to support the stock (my opinion).