You should describe your thread in detail, not just leaving a link, Upbit hacking is widely discussed on social media, whether it's true hacking or the old way to fool users, the problem was that there were many scam companies with hacking reasons, I'm not an upbit user so I don't know for sure the real problem.
I agree with all of what you wrote, starting with how OP lazily created this thread--and there's already another thread about it, too.
The first thing I thought was that this might not really be a hack, but a Cryptsy or Mt. Gox-type exit scam, but I have no idea what the real truth is. As I said in another thread, I noticed that Upbit was the object of some sort of fraud investigation in 2018 so who knows what's going on with them. But at this point nothing would surprise me as far as the claim of "we've been hacked!" goes. Seems like we've heard that so many times before that the first feeling you get upon hearing it again is one of total cynicism.
Regardless of whether the hack was a real one or not, it looks like they lost a lot of money and I don't think this is going to be like Binance's 700
BTC hack that they easily recovered from. My guess is that this is going to put them under for good.