Is it possible to add the Manage Subscription URL in the reply template that is sent back to the customer when submitting a request?
Or is it best to add this link to the New user template?
No, the subscription URL is not available as a reply template variable.
Would it be a good idea to include this as a possibility? Currently the only option to get a marketing consent is through the automatic e-mail that is sent when creating a person.
Having the subscription link in a reply template would definitely be useful. Any chance this is going to happen at some point?