Facebook's Pay to Promote

Facebook is always searching for new ways to increase revenue, especially since their social platform is completely free. There newest idea is to allow friends pay $7 to promote another friend's post. My first reaction was "Who would ever pay for something on Facebook?"But as I considered it more, some of my friends posts need to be promoted and need help to spread the word. For example, if a friend needs help raising awareness about a charity or an event, then I would be inclined to pay the $7 to help get the word out. However I would not pay to promote a friend's post if they are trying to sell something, etc. That is what Craig's List is for and you can do it for free. When it comes down to the fact of when I can actually pay to promote, more than likely I will not actually do it. No matter what the post is because it comes down to the fact that I am a college student and much rather spend my $7 else where like beer or clothes (haha but seriously).