'TWITTER KILLER' Mark Zuckerberg Elon Musk rivalry intensifies as Meta’s Threads app ‘gains 10million users’ within hours of launchMARK Zuckerberg's Threads app has officially launched and has seen more than 10million people join already. The Threads app has been referred to as "Twitter Killer" as it's a direct competitor with Elon Musk's social media platform. THREADS USERS DIVIDEDMany of the first Threads users have shared their reviews of the app. Another early adopter said they had already canceled their Threads account, but in the process had to close their Instagram account as well. Emily Hughes tweeted: "I deactivated my Threads account already but it turns out you can’t delete your Threads account without also deleting your Instagram account so maybe just don’t sign up!"