The site that I have this plug-in installed on is a low-traffic, very specific board, and all registrations are moderated. Once a year, we turn off the moderation for a short burst of high traffic, but watch the registrations carefully. (running vBulletin 3.8.3)
The module works extremely well. As the StopForumSpam database builds, the number of registrations that get through continue to drop. I'm now seeing one every month or so that get through, and as many as a thousand that don't.
With that said, I would like to advise all of the folks that are installing this, and having difficulties, to please take the time to troubleshoot the problem, and provide some
detail when you finally post here with problems.
I "hear" the frustration in Pedigree's "voice" when you come on here and say "it's broken...what's wrong with your program?" This is definitely a case of PEBKAC
Sorry...this isn't the place for me to sound off, but I'm a programmer too and have to deal with the same stuff...

Pedigree, I give you two-thumbs-up! :up::up: