Thanks for the slack link.  That's working.  A touch of professionalism would have subtratum put the correct link on their site.  

Why do they have http://x.co/SubSlack link on the substratum site (after you invest the link is on page that appears after you submit)?

Why do they leave a broken link?

Certainly not "FUDing" whatever that means.  I don't have any tokens yet, and until now, had only their broken slack link.

If I get my token, then all is not lost.