Conditional Opt-In Based on Field?

Hi @wallacelin ,

I hope you’re doing well.

There is a built-in option in Hustle that integrates with tools like Mailchimp: https://wpmudev.com/docs/wpmu-dev-plugins/hustle/#mailchimp

You can deactivate the option to automatically opt-in new users, and then users would need to confirm their subscription to your opt-in by clicking a confirmation link in an email sent to them.

There are also many fields that you can use in your opt-in form: https://wpmudev.com/docs/wpmu-dev-plugins/hustle/#emails

Please let us know if this helps.
Best Regards,
Williams Valerio