Anyone who wants emails from the forum -- and I live in my email client, so I'm definitely one of them -- can set up their preferences to get an email every time a new topic is posted to any sub-forum, or any time a new post is made to a specific thread. That's a lot more useful to me than spammy digest emails, to be honest... means the only time I actually have to visit the website itself is if I've had an email about a post that I want to reply to.
(Or actually, to subscribe to a new thread that I've had an email about... annoyingly, in this latest version of the forum software, the 'new topic posted' email doesn't include a 'subscribe to new posts' link, which the previous version used to have.)