I heard that if you want to join Discord you have to be an investor if not then you can't get it so in essence they only choose certain people who really support this project
Where did you hear that from? I think if there is a discord, it will only be for team discussion and not for investors. If indeed it is for investors, there should be many who can join.
Only this time I heard something like that. It could be the fake XSL Labs group, just becareful, since I couldn't find this project discord channel or invitation. All social media they have is twitter, telegram and facebook. If there's a discord channel, I'm sure they will also post it on this thread and on the website.