Mr. Smith already provided you the answer. There is a CRTC regulation that allows closed-loop social networks: if they post the information about how contacts will be exchanged on the site, they're pretty much exempt from this. At the moment, they're not really covered when you're within Facebook. I believe that's why you're not getting Facebook appearing before you here to say this thing is impeding their business.
I know this because we fought against it. We went to the folks at Industry Canada at the time and said we think there should be some kind of control from this act within Facebook and these other platforms, and they said no. At the moment, it's pretty much fair game as long as they post the rules.