I don't know what it does. Landing screen without any information whatsoever, asking me to 'log in with Facebook'. What is this about? Ignoring my FB dislike,

I don't know what it does. Landing screen without any information whatsoever, asking me to 'log in with Facebook'. What is this about? Ignoring my FB dislike, why should I log in to something that I know zilch about? "Show HN" works only if you actually show something.