Facebook has a kind of campaign that is explicitly to garner likes, nothing illicit about it. There are multiple articles about the quality of the demographic

Facebook has a kind of campaign that is explicitly to garner likes, nothing illicit about it. There are multiple articles about the quality of the demographic you get when you use their official platform. Conspiracy theorists point out that likes are a very weak signal of interest, and thus it's hard to judge if you got good likes or bad likes. Facebook has a conflict of interest in choosing who to show your like ad to: if both Alice and Eve are willing to like you with equal probability, but Eve is less likely to be an engaged fan, Facebook should show your ad to Eve. You got your like, so you're happy, but your content is less likely to organically go viral, because Eve isn't as engaged as Alice would have been. Notably, not all of your fans will see your posts: Facebook no longer guarantees delivery to people who have liked you. Luckily, Facebook will help you run a campaign to target the fans of your page that you just paid to get.