Facebook, which has more than 2 billion people logging in monthly, has never failed to grow its user base. To beat investors’ expectations consistently on user numbers, it’s just as important for the company to retain people like Gorantala as it is to recruit new members. People who are logging into Facebook less often—but aren’t fully disconnected—are noticing more and more frequent prompts to come back, sometimes multiple times a day, via emails or text messages reminding them what they’re missing out on, according to screenshots and reports from users around the world. Gorantala, who eased off his Facebook usage because of privacy concerns, said his security prompt comes “whenever I don’t log in for a few days.”
Even with regular users, Facebook has become thirstier for posts. The social network’s reminder boxes at the top of the news feed, which often show memories or anniversaries of...