Bitcointalk is very big, I know, but it has a "trap". If we are based simply on the numbers there are several ways of looking at it. Of the 2,920,133 users they have, all multiple accounts, spammers, accounts inactive for years and more should be removed. But where there is more to eliminate is in the number of posts, 55,894,886. As most of us already know, the huge amount of "hello", "nice project", "+1", "likes" and other shitty posts made by bots to upload a post. If we remove everything I have said and more, their numbers are greatly reduced.
We must also remember the humane treatment of the mods, I'm not going to say any of that because it's embarrassing. No, bitcointalk is not that big.