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Pay What You Want for Pid at IndieGameStand.
Minimum price is $0.25. Pay at least $1.00 to get activation keys for Desura GOG and Steam.
(Thanks to Shad0wen for the heads up. GOG + Steam keys only. Not Desura!)
Steam and GOG keys, not Desura
Nice catch. So used to Desura keys. Didn’t even look twice.