This article basically says that Facebook is making its product worse for users to make it more valuable to advertisers. I don't think that's the case. A Facebook where users share most of the things they post with everyone but restrict the privacy of the few items that they don't want everyone to see is a more useful and interesting product to use. They just need to make it clear who will be able to see the item you're about to post instead of hiding it behind the lock button. A more open Facebook is more valuable to advertisers and users.