Facebook Won't Let You Post About This Competitor
Facebook says links to tsu.co are "unsafe" and is preventing users from posting about the site on Instagram, Messenger and other Facebook properties.By Matt Moreno | November 9, 2015
Facebook doesn't want you cheating on it with other social media sites, but it especially doesn't want you seeing this one in particular.
It's called tsu, and Facebook is blocking users on all of its platforms who try to post about it, warning it's unsafe.
Though the official tsu Facebook page seems to still be intact.