BHW: How is this possible?

I was browsing some very old posts, just for fun, when I came across this comment.

The comment was posted in 2008 but the account was created in 2011.

View attachment 147043
Probably because count is saved to another table so that the forum (or some other software. Not specific to BHW) does not have to do select count(id) from tablename every time? Seems reasonable. It's a very old post.
 
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