This Integrity "community" seems small, and that is including participants who are PTC employees.
See this other Community thread where I linked to the customer stories page on ptc.com. There are some case studies at the bottom of the page showing how those companies use Integrity.
Thanks. The promo page referred to was helpful to me, but it wasn't a "correct answer". The referred page gives 6 good case examples of successful implementations. But it doesn't tell me anything about the size of the Integrity user group (out there) or the size of this community membership.