It is not just that. The worrying thing is that they are violating net neutrality by making sure that "FB and friends" is the only thing accessible on this free internet. If Mr. Zuckerberg is that altruistic, why not provide proper full internet? Even a limited (say 500MB per person/month) internet for free is better than nothing.
But no, they want to violate net neutrality by disallowing everyone else. They don't want to provide HTTPS security, but again snoop around their user's data so monies could be made out of that. Is this altruism, Mr. Zuckerberg?