Everyone should actively avoid anything even remotely associated with Justin Sun; he's infamous for being not only sketchy, but incredibly hostile.
Note that he used user funds on Poloniex and other exchanges to perform a hostile takeover of the Steem network recently and called the community "hackers" for speaking out against his tyrant ways. Speaking out on Steem will now get you censored.
this is Justin's usual marketing moves and everyone is already accustomed and everyone understands that if Justin San does something like that, he will bring a lot of money to the holders of his coin