About Wikimedia: "Several times, the Wikimedia Endowment has promised to convert the entity into a more transparent 501(c)(3) organisation. This would lift the veil of secrecy that shrouds the fund. In seven years, we still lack basic details of expenses and salaries."

https://www.telegraph.co.uk/business/2023/08/28/wikipedia-donations-contributors-social-justice-charities/