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Looking at the last few pages, it seems that around 5 posts in this thread are made per day. Extrapolating from that rate, we'll hit 1,000,000 in approximately 151,280 days; or around September 7th, 2438.
Look at that, a new person just a day later :D I was about to make a "Monday hasn't even started for me yet" joke, then remembered it's half past midnight XD
I also daily play out all the recently active Forum Games, and few of the Pokemon Trivia, as these are the only games which I play nowadays...mostly. Takes around 45-50 minutes in a day, and that seems quite optimal to me.