What can you possibly accomplish on Facebook for 7 hours a week? I can understand the needed distraction here and there or the defined communication with friend

What can you possibly accomplish on Facebook for 7 hours a week? I can understand the needed distraction here and there or the defined communication with friends but really?* I'll stop my inflammatory rant because I'm going to assume you're a reasonably smart cookie because you're here. But really? *for a 6 month personal experiment I deactivated my FB account and defriended, 2% of current friends per reactivation (17 times each under an hour) and could argue that I still have a top 5% social life.