I‘m not sure if I‘m missing something, but I‘d be really surprised if Volition was doing fine. Agents of Mayhem didn‘t do well at all and the Saints Row reboot was pretty terrible. Their last somewhat successful launch was probably the Saints Row 4 expansion back in 2015.
It‘s always sad to see a developer shut down, especially one with such history. But I can honestly understand closing a studio which hasn‘t had any great release for over eight years.