The behavior varies depending on the email marketing platform:
Mailchimp
Requirement: Ok To Send Email must be set to true for contact details to be passed to Mailchimp.
Opts in For Marketing determines whether the contact is marked as Subscribed or Unsubscribed.
ActiveCampaign and Constant Contact
Requirement: Both Ok To Send Email and Opts in For Marketing must be set to true for contact details to be passed to the platform.
With both flags set to true, the contact will be added and marked as Subscribed.
This approach ensures compliance with each platform’s requirements for user consent and email marketing permissions.