But please enlighten me. What kind of conversations could have possibly happened before this letter that could justify saying something like "You invested money (or time) and we've just lost all of it. You will be getting $0. But I need you to sign this so that other people CAN get some money. Oh by the way, it's a great news!"
Most common stock holders are probably former employees (whereas preferred stock holders are VCs). At this point I'm sure they didn't expect much out of this anyway, but they were once people who truly believed in the vision. If I were one of those people I wouldn't be happy to hear this fake facade about how this is a "great news". Phrases like this you should only use it for PR you send to Techcrunch, saying you had an incredible journey. But not to former employees who made a lot of sacrifices. To those people you be honest.