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 a matter of politics. The tax authority doesn’t care about the political stance of the German government. They also sometimes just take weird decisions that seem pretty random, but it’s nothing political.