Marketers listen up. Facebook Inc. is telling you to stop asking for Likes. Facebook says it is tweaking the algorithm it uses to rank posts in its news feed to penalize what it calls "Like-baiting," marketers who ask users to Like, comment or share posts, and those who post non-original content and who feature "spammy" links. The moves aims to punish marketers who "deliberately try and game [the] news feed [algorithm] to get more distribution than they normally would," writes Facebook software engineer Erich Owens and product manager Chris Turitzin in a blog post. Posts that directly ask...