Thanks everyone for sharing your feedback!
I just want to add some more information to clarify my post, people within a company without a license can submit forms, not just guests. If a person is an employee of the company and has an email address that matches a verified domain on the organization, they can authenticate their email address and access the organization only form without taking a license. They can then comment back and forth via email.
I understand you would like the ability for users who don’t share the same email domain to submit the form and communicate with Asana users, without the need to be added to the organization. This is currently not possible, as you mention, the user would need to be added as a guest in the organization.
I have passed your feedback to our product team so they can consider as they enhance request tracking in the future! 