Ace who is most likely to be "Anthony Tyler Nashatka" had a Court document updated/opened on February 14th (2 days before OGU went down).
The name above was posted on Doxbin and you may be wondering if it was him he would have gotten it removed but if you think about it if he did that it just confirms that it is him.
Second of all I'm not sure if it's seized as if it was it would already be on the feds DNS but it's been a week and it's on Namecheap's default DNS.
I believe he just got a court update and had enough and pulled the plug or he made some kind of deal with the court or feds to shut the forum down.
DNS:
ogu.gg DNS information. DNS records such SOA, TTL, MX, TXT and more.
who.is
I am pretty sure these are the court documents and you have to pay to view:
ecf.cand.uscourts.gov