I would actually say that it's been successful in determining at least one, so far, large scale abuser, which can the be blocked via more traditional methods.

I have my own project that finds malicious traffic IP addresses, and through searching through the results, it's allowed me to identify IP address ranges to be blocked completely.

Yielding useful information may not have been what it was designed to do, but it's still a useful outcome. Funny thing about Anubis' viral popularity is that it was designed to just protect the author's personal site from a vast army of resource-sucking marauders, and grew because it was open sourced and a LOT of other people found it useful and effective.