I'm using exp:user:register, the group_id parameter (https://www.solspace.com/docs/user/register/#group_id), but it's being ignored. I see in the documentation that "This parameter respects native EE account activation settings," so does this mean I can't set group_id as long as I have email activation set?
In EE Member Preferences, there's "Default Member Group Assigned to New Members" that is being used instead. But I'd like to override this using exp:user:register. Possible?