Sai means a stabbing weapon, looks just like the "Compass E Pitchfork", which was introduced in their Spotify video game project. It was used by Banditoes to show how the dema's compass is false and means truth and rebellion against dema.
Tyler Joseph addressed his "platform tweet" in his Christmas party streaming on Dec. 8. Here's what he said.
Tyler, Michael Gibson, and another guy played Fortnite "at the final event in the Chipotle Challenger Series". But only Tyler and Josh and Mark (who is in the basement) appeared on the screen.
Joseph announced that he is holding a Christmas party at 5:30 p.m. est on Dec. 8 (aka 7:30 a.m. Dec. 9 in China & HK), where he will play Fortnite with Michael Gibson and have a gift for each of us "at the end of the stream".
Tyler Joseph will participate in the Chipotle's Fortnite Tournament competition on Dec. 8. It will start streaming at 6 PM ET (Dec. 9, 7:00 a.m. HKT) on band's Twitch account, which Mark Eshleman helped set up.