That's opaque; of course it's the same as if he had donated directly.

I'm not accusing him of illegal tax evasion. I'm accusing him, and Facebook, of legally not paying taxes. That it's legal, though, is of little consolation. Remember that it was legal to send Rosa Parks to the back of the bus, at the time. The criticism is directly that its legality is a poor veil and its morality open to debate.