I'm gonna have to part company with you on this one. Landomata is the fellow who put together NXTTY, so it's not a cloning: it's a rebranding.
His pivot to Newbium is essentially a business decision. NXTTY started off okay but never took off; evidently Lando decided that it was futile to offer a chat app that tried to be all things to all people. Newbium is being designed to cater to a niche (crypto speculators.)
That's the way I see it, anyway.
I agree with Nxtblg here, NXTTY might not have taken off but it *could* have (still might, aren't DARPA looking for a anon chat app now?), it wasn't a scam, and Landomata has been around for a while and showed persistence, which is one of the essential herbs & spices needed in any successful start-up. Rarely does the first iteration of an idea hit the jackpot