Afaict there is no definitive proof or conviction of SA. All evidence available comes from Pieke and exurb1a doesn’t seem to want to publicly engage with the accusations. Here is a third perspective that covers the most relevant pieces of evidence. It looks bad for exurb1a and the evidence to me seems to show some level of manipulation and drug-related bad behavior on his part, but as always, for any severe accusation, it is good to trust victims, but one should also withhold definitive judgement on the accused until proven guilty (either by undeniable evidence or legal proceeding).