I saw a topic which had been closed, but wanted to add my voice to this. The abilty to upgrade a member to a team member, and vice versa would be great.
The reason it would be better than "deleting and recreating" is
You also asked what the use cases for this are
In the previous topic you suggested "making people full team members from the start". Obviously that costs more money! If the guests are designed to make them difficult to integrate into an employee progression workflow, just don't offer them!
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