Oooo dang, the lack of an "opt out of future emails" checkbox really gives me pause there. Charitable donations are second only to vehicle purchases in the avalanche of shit they trigger.

Welp. Did it anyway. There's a "make my donation anonymous" checkbox on the second page, but that doesn't actually specify whether it opts out of emails, or merely hides my name from some list. Well, it's worth it either way.