His full name and contact info is on the website:
https://evergreensmallbusiness.com/795-s-corporation-tax-ret...
He's a small business CPA. He did some research and published it. From his professional perspective, this is no different than Show HN: Video subtitle maker.
Look, I can't stand the Mercers and the Kochs as much as the next dweeb but you actually have to establish that link.