Will gain then lose.
I have no plans on investing a dime in this company. I've come to realize that tech companies / internet companies get their highs and lows and can't be trusted in the long term.
I get the impression that people that are on facebook regularly have no concern for privacy and are more interested in being provided "useful / relevant" information provided to them instead of having to look for it. The next stage to this is going to be your mobile keeping track of what you buy, what you search, what you like, what your friends like, etc. Facebook is just generation 1 of this massive data collection and as long as the masses continue not to be concerned about privacy, there will be another start up that will invade privacy even more and the masses will "enjoy" the benefits it offers.