"Who cares about giving more money to their friends' posts if there's nothing in it for them? Do you go out and buy a bunch of stuff for your friends so that they can have more things for themselves? Who actually does this?"
I sent a complete stranger, granted we were part of the same facebook group but I was never "friendly" or a "friend" to the person $1000 cash, through the mail (fuck legality), for nothing in return to do as he wished, simply because I knew that the person he was infatuated with/in love with was traveling across the country to meet with him (not a cupid move or a cupid fb group). People do all kinds of things when it comes with sharing and giving and there is no "real world" who does this in that sense.