In case anyone's still using Facebook to market their work, Colleen Doran -- comic writer and artist, who writes some great business posts when she's not busy making a living -- talks about why paying Facebook to try to reach more people is an expensive waste. Buying ads to get more "likes" actually makes it harder for your real fans to see what you post. The more you spend to get more likes on your page, the fewer real fans see each post. Facebook won't fix this because they're making money on it.
Check out Colleen's post and watch the video by Veritasium, explaining an experiment they did and the conclusions drawn. Every time I see something like this, I'm that much happier I've never bothered with Facebook.