I got Rise of the Triad key today and the game showed as "redeemable" after using the code. When I tried to redeem the code I was always being redirected to the same page. For some reason GOG didn't show me as "logged in" on the redeem page.
GOG support agent mailed me a new code and also that doesn't work. I can't redeem codes in general.

I also tried Tor browser. I'm using Firefox beta because one extension was incompatible with Firefox 37.

I've cleaned my cookies.

I think there was a time-window of when you were supposed to redeem the key received. You can still make it I think.
Maybe this helps, check here.

Was it a 20 min window to redeem?

Yes, it was. GOG did a stress test.
So, if you got a key try doing this http://www.reddit.com/r/patientgamers/comments/35xmua/hey_rpatientgamers_were_giving_away_8k_copies_of/cr8vpdd or try reading the last posts here http://www.reddit.com/r/patientgamers/comments/35xmua/hey_rpatientgamers_were_giving_away_8k_copies_of/

Yeah, I remember reading about it, then saw the restrictions and it seemed like McEffort so I didn't bother, having to create an account, then wait for the code release then have a short timeframe to redeem put too many barriers in the way of my interest :).

At least I haven't been able to log into GOG with the TOR browser. Maybe the GOG pages don't like how it tried to hide the original IP address or something.

Same here. Didn't get it...

GOG support agent gave me a new key because I wasn't able to redeem my code in time!

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