It starts in 1 hour and 10 minutes.
To fill you in on the change I am making this time. I've decided that I will not be informing you (as I have in the past) when a game is redeemed. I will not even tell you at time of validation. To find out if it's redeemed, you'll have to obtain all four parts and let GOG tell you.
I think this will have some interesting repercussions. For starters, it means that we are less likely to get down to the situation where there are a few games left, but the people with the codes for them don't want those games, as most other games will apparently still be live.
As for your strategies, I suspect you'll need to watch out for fragments suddenly being franticly traded, as people try to offload the redeemed games before other people discover it. If it seems to good to be true...