Hi Kyle,
Here is what we are doing according to our developers:
We have some code to update info in a few tables:
__comprofiler
__acymailing_listsub
__acymailing_list
But nothing that we see makes a change to the Joomla users table.
Regarding the possible trigger in CB Auto Actions...
The "onAfterUserRegistration' trigger is being used in the CB Auto Actions.
I have attached an image of what that does.
Does any of this help or can we provide additional information?
Thank you for the help.