It's front page news everywhere. Unless someone is backpacking outside of cellular range, they're going to check in on the possible collapse of their company. The number of employees who aren't aware of and engaged with what's going on is likely very small, if not zero.
10% (the percentage who have yet to sign last I checked) is already in the realm of lizard-constant small. And "engagement" may feel superfluous even to those who don't separate work from personal time.
(Thinking of lizards, the dragon I know who works there is well aware of what's going on, I've not asked him if he's signed it).