Re. "99% shitty stocks": Currently it consists of 100% shitty stocks, as explained
here.100% shitty stocks is not true because AM and BDD have been successful.
...
AM has been failing spectacularly since its listing on Havelock. Like so:

If something was awesome before coming to Havelock and turned into a bag of dicks right after being listed, well... Not sure just how well that speaks of Havelock.

BDD is not a security but a game, as the issuer will gladly and honestly tell you. If you chose to see it as a security, disregarding the issuer's claim, it becomes a failure due to it being a ((zero-sum) - (fees)) game. twentyseventy charges a fee for running the game, a perfectly justified one.