Coincidentally, this is also a good measure of the lock-in facebook has. If no one hears about this it means facebook has achieved a certain level of control of the amount of information people get— they have in that case truly invested successfully in 'virtual reality'.
Facebook in my experience does a great job with tge advertisements not being too onerous and not having too much spam. Spamming Facebook with tons of links to your social network site is not a legitimate advertising tool