I love how they changed Highlight to Announce to Promote, as if they changed anything. I think, of course, that for any other reason than trolling people you don't know, it is utterly fucking useless, a waste of time, and a waste of money. A large waste of money, for the paltry job it does. Facebook for many people is a communication tool for contacting people you know. You simply add these people as friends and all of a sudden ho! There are a plethora of ways to get them to read something you want them to!
The only people you're reaching with this stupid feature are people you don't care about and people you go out of your way to dislike.
That said...
Rickrolling everyone on Facebook, or promoting your friend's suspicious admission of homosexuality, those have got to be worth $7 to someone.