[bretpiatt]

All cash does not mean there isn't a portion of it restricted to a time or objective based schedule for key employees (or even all employees and shareholders).

If they intend to continue operating it (highly likely) buying while they are still with cash, all of their staff, and vibrant is quite possibly a better outcome than buying a broken company for less even only a few months later.

Disclosure: I am long Yahoo in my personal portfolio and I've led many M&A activities for Rackspace.