Partner with Verizon. Why aren't we?

Slightly clunky wording in this advert for Verizon, as seen on ComputerWeekly.com:


'Partner' is being used as a verb here, so I would have opted for 'why don't we?' rather than 'why aren't we?'.

I wonder whether the fact that 'partner' can be a noun or a verb caused some confusion. Or was the confusion over tenses: present simple ('partner') followed by present continuous ('why aren't we [partnering])?