As part of our commitment to supporting the growth and operational capabilities of Mastodon, we have established a 501(c)(3) non-profit entity in the United States aimed at facilitating our efforts, including being able to receive tax-deductible U.S. donations.
That’s not what the story is here - this is an additional fund raising entity to support the independence of the platform. The post is very clear that Mastodon (the project) remains a European organisation