Issue
You want to understand what a Pro Module is and who is entitled to them.
Resolution
A Pro Module (referred to in Salesforce as an Accelerator) is a structured engagement, wherein a member (or members) of the CSA team works with an Enterprise customer to accomplish a specific goal.
A list of available Pro Modules can be found under Enterprise Resources on the Heroku Help site.
Details about an individual Pro Module can be found by clicking the "More Info" link by any listed Pro Module.