#2 Feb 24, 2014 16:16
I was formerly the 'spam janitor' with the job of reviewing and publishing the spam submissions. Although the antispam central blacklist is still running it is indeed hardly ever updated now. There are two reasons for this.
1) The recent versions of b2evo don't seem to interact with the blacklist in the same way, and for whatever reason the number of submissions to the blacklist is lower than it used to be.
2) Spam is getting cleverer and our way of identifying spam which dates back many years is not as good as it used to be - in fact, it's pretty poor nowadays. Obviously I'm not going into the detail of what criteria we use to detect spam but suffice to say it isn't flexible enough to respond to the fast-changing tends in comment spam.
The developers are aware of this issue and as a result there is likely to be a review of the antispam system in a future release. In the meanwhile the existing system still has a good hit rate for quite a lot of traditional spam, so do keep using it, but updates are likely to be few if any until the system is reviewed.