A forum where hackers and cybercriminals trade stolen Instagram and Twitter accounts was apparently hacked. The administrator of the forum, which is called OGUSERS, announced it in a post on the forum itself on Thursday. OGUSERS, also known as OGU within its members, is a forum ostensibly launched to trade “OG” usernames, as in: unique, short, and rare usernames. The forum became a hotbed for hackers who specialized in breaking into other people’s accounts, taking control of them, and then selling them to the highest bidder, as a Motherboard investigation revealed last year. Several members of OGUSERS used a technique called SIM swapping to hijack people’s phone numbers. “It's like a nuke dropped on the site,” a OGUSERS member told Motherboard, explaining that people are quitting the site, worried that authorities have their data, or that others will now hack their accounts.