We do not want to use the WebCollect form to add contacts to a list because we want to use data extensions instead. We want to use DEManager to submit form data to to add a contact to a data extension.
All I could find documentation wise is this article in the salesforce documentation: https://help.salesforce.com/articleView?id=mc_es_demanager.htm&type=5
Is there a concern in using this to submit contact data to a data extension? Is this an add/update only endpoint?
Why does the answer to this question: Using ExactTarget DEManager to update record? suggest that "is recommended to use the SOAP API data extension functionality for forms that are hosted outside of the Salesforce Marketing Cloud"?