As other users have said, there's no proof Justin Sun is involved, in fact, If I was interested in something and realized JS was involved, I would do a 180 and walk away. Haven't you seen how he is wrecking his own projects? The guy is a criminal in his own country... come on...
If there is no proof and they are claiming that Justin Sun is involved in the project then we should be careful about this project. We should dig deeper and do research about the project. Aside from that I browse the site and look at their wp but can't find the person behind this project. Isn't it another red flag for us? They are offering free tokens to those who will stake Tron probably in their site since interested party need to pledge their TRX to gain JST.