I have two colonies with 2,27m and 1,95m citizens. The wiki states that with 1m citizens colonies start producing trade goods, yet my colonies so far only demand infrastructure. Is there any tech i missed (i started with a conventional empire), or was the limit raised in a patch? I have looked extensively in this forum but did not find an answer.
Tech shouldn't matter (I assume you have trans-newtonian, but I don't think even that should matter).
My guess is the wiki is incorrect. You might see what happens at 3m - I have a vague recollection of that being one of the breaks.
Note that you just get a few trade goods at first - there are at least two break values.
John