> I got a notification email from the forum software and the links came through.
> Before each link, there's an HTML comment. It's also weird that it's broken up into
> two lines (the first is 990 characters long) and there's a space as the first
> character of each line.
> I've attached a text file with the source in case it helps with making rules to
> detect automated spam.
They're trying to add invisible links that can be detected by Google's crawlers, increasing their search rank. It's BS.