I would also like to see the source for this claim.
About a week and a half to two weeks ago they made a blue post stating they were substantially raising the population cap. So what you said is the opposite of what Blizzard said.
Edit: So they increased the realm population a little less than three weeks ago. I was wrong when I originally said one and a half to two weeks ago. But still, here’s Blizzard’s post. I haven’t saw anything to state otherwise.
Edit 2: Even though you didn’t back up your statement anywhere in this thread that I see, I will at least back up mine. This is the blue post where they state that they were substantially increasing the realm population on all realms.
Now, if you have a source from Blizzard saying the opposite, I would really like to see that.