I am aware about the SPS shenanigans happening. I wrote a couple other posts about the subject. To put it shortly, SPS is not justice, as it's a whale-only game. Basic knowledge of game theory + an analysis of the stake distribution will be enough for you to be convinced about this.
Also I don't see any big stake holders (like Justin Sun) creating a proposal to get his funds back. I guess he understands he has 0 chance of getting his money back, and doesn't want to humiliate himself ;)