I'm not a facebook user but wonder when will they also start charging - if not already.

There are these 'functions' that are free, but over time the benefit these corporations have over the general population (vast majority pay nothing for Google services, for example...) is lock in.

The deal has been you get the information to target ads to us for the ability to use the service(s) of the platform. If the Book of Face were to ever consider this...that could be the beginning of the end, in my mind.