Well I also found this article by ProPublica that says U.S billionaires faced taxes as low as 0%. You say the terminology creates a bit of difference I guess, facing the tax is not equivalent of paying those taxes. An example would be Amazon's recent beef with EU regulators in Luxembourg. These giants owe taxes but they have found ways that help them not to actually pay these taxes.
Link to article: https://www.bloomberg.com/news/articles/2021-06-08/u-s-billl...