Robot nag at work today:

"We believe that taking time away from work to rest, recuperate, spend time with family and/or loved ones, or to pursue personal interests is an important part of being a [worker here]. We noticed you have a balance of greater than 80 hours of unused PTO/Annual Leave for the current benefit year, and want to encourage you to take advantage of this important [...] benefit."

Why is this happening? What is the upside for the company?