It'll sell, because as we've learned from Electronic Arts, no matter how bad a company treats its employees, consumers don't give a fuck as long as they can get their fix.
But business reputation is a different story. Talented people may choose to avoid the company, knowing what Chris went through and the management drama. Indeed, Chris, though he won't admit it, is a super star of sorts among game writers, and we've read, in the past, people who joined Obsidian specifically to work with him. Also, with Chris turning on the company, it'll become impossible for them to use his legacy and reputation in any way to convince publishers and investors to finance their projects, and there will be sales losses from that, as well.