Yes, Facebook is profiting from my clickstreams. In other words, it's benefiting from my "work". But I'm also benefiting from Facebook. The only reason you use Facebook is because it adds value to your life in some way right? So to me, having Facebook around is mutually beneficial.

Frankly, I get the point the author is making. Personally, because I'm benefiting from Facebook's existence, I'm fine with them profiting from my contribution to the social graph.