Too Long; Didn't Read
If you want to spread your stories, become nepotistic with everyone else. You need to constantly push a version of your story to all those platforms, build up followers on those platforms to so they re-share your story, that then drives them and others towards your platform. As of 2020, that seems to be Facebook, YouTube, WhatsApp, Messenger, WeChat, TikTok, Instagram, Tumblr, Reddit, & Twitter - roughly in that order. We will be making Party, a browser extension and mobile app (eventually) that automatically posts to all the other sites whenever you post to any one of the sites.