@lackthereof The technical difference is only partially why that stance was taken. As I understand it, they didn't even give away mail, they gave away the credit card processing token (Or the information outright), so that the credit card processing company could reveal more information. That is, Proton Mail made a point that they still cannot actually retrieve mail from their servers without doing the skeleton thing, and they aren't doing that. But they did hand over information similar to a journalist not giving away their source, but instead giving away where they met their source and who knew their source, on account of a warrant.