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Agreed. Though, I don't know of any way to directly send money to Laura Poitras and co.

I'm sure they would also appreciate donations made to the EFF.

You could also consider donating to the Freedom of the Press Foundation https://freedom.press/donate or the Courage Found https://couragefound.org/donate

The closest I could find is Snowdens legal fund: https://edwardsnowden.com/donate/