He actually has freely-provided reasons why someone probably shouldn't apply for a registration fee refund. Go here
How to Get Your $5 Drone Registration Refund & Info Deleted. - and scroll down to "
Words of Warning Before Filling it Out."
I don't think Jonathan Rupprecht deserves criticism for recommending professional legal advice for issues that go beyond what he has freely-explained considering that he has provided such an enormous amount of free information and legal interpretation, and considering that there is nothing wrong with an aviation attorney offering his services.
Anyone interested in drones who has not done so already should go to his website
Drone Attorney and Legal Assistance -, click the "Articles" menu selection at the top of the page, and see the huge amount of valuable and interesting information he has freely provided.
I have had no involvement with him of any kind, but having read most of what he has posted, wouldn't hesitate to engage him for professional help with an aviation-related legal issue.