I'm working with a customer who's ESP is SailThru.  Your connector only pulls a subset of fields from the Profile/User object.  Unfortunately, optout is not one of these fields (optout_date is present) and understanding customer marketing consent is extremely important.  Please add this field (and all others listed in their documentation) so this connector can be utilized.

https://getstarted.sailthru.com/developers/zephyr-syntax/profile-object/