Facebook:  Your last post is performing better than 95% of your other posts.  You should boost it.

Me:

Facebook: Your post continues to perform well.  For $10 we can show it to 1500-3000 more people.

Me:  …

Facebook:  No really! Boosting your post will drive more hits and likes to your business.  Boosting your recent popular post will enable you reach thousands more people for just $5.

Me:  Okay, fine.  Here’s $10 bucks.
Facebook:  Your boost is rejected!