First of all, UP definitely cares about what Glassdoor and Indeed say, because they keep spamming both sites with fake positive reviews (interestingly, Glassdoor has quietly taken some of the more obvious ones down).
Hopefully UP and the person with the 9% employee approval rating understand that they can only expect to effectively run a company where 91% of employees hate the leadership and 83% wouldn't refer their worst enemy to a job there for so long. It's already spilling over into operations, and it will get worse.