I have a suspicion they removed it because of the amount of spam on those forums. There's tons of abandoned forums that are only occupied by spambots.
There's even pretty convincing looking accounts and messages that turn out to be spam in the end, once they start trying to post links.
I have Akismet on the comment section of the Wordpress front-end of the site I run, it basically said something like 99.99% of attempted comments were spam. I'm sure the same applies to e-mail and the like.
That percentage sounds about right to me. I've seen comments on blogs from ~10-15 years ago, that continue to have spam posted to them. The first 2-3 comments will be relevant, but comments 50-100 may have a single relevant comment along them, with a total of anywhere from 300-3000 comments. Older comments link mainly to blogs (*.WordPress.com) and such, while newer comments link to Facebook and Instagram.
There's even pretty convincing looking accounts and messages that turn out to be spam in the end, once they start trying to post links.
I have Akismet on the comment section of the Wordpress front-end of the site I run, it basically said something like 99.99% of attempted comments were spam. I'm sure the same applies to e-mail and the like.