People have learned that free cheese is always in a mouth trap. That said, they just take for granted the fact that even though they are Facebook, it is Facebook that earns money. In fact, they can't imagine it can be different. It is deeply rooted in us that free services must be paid for with our attention even though we make those free services work with our own talent and time.
Discrepancies, illogicalities and contradictions. Life is full of them...