Because he wasn't interested in providing documents or discussing accusations, he was interested in creating topics.
And no, it's not just 8 days since he created a similar topic on January 22nd if they would have had any proof they would have posted it in the previous topic not again claiming just like last time they will post it "soon", so expect another topic in March with the same copy-paste content and no actual proof of this even happening. They are interested in the title and content being indexed and maybe using it as an attempt to have some sort of leverage, give us money or we're going to post these kinds of topics all over the net.
That's possible because checking the scam section for a thread that existed about OKX, this is the only thread that comes out, what you posted could be the real scenario if OP will not provide any evidence for the basis in calling OKX a scam exchange.
If another one comes out without any strong evidence to prove their allegation, then its possible that a syndicate is behind this, I don't want to speculate but OP is not showing anything and we have proof of extortion in the past about reputable platforms.