Succesful is matter of definition, and isn’t same thing than ability to do something.
To stay on topic, kind of, for me succesful ratio to identify spam is zero or really high, depending of definition. It is zero, because all it found were false positives. It is really high, because everything else it didn’t report spams.
On both cases it has ability to do something.
Same will happend when AI classifies topic. And, this is pure opinion, it writes almost never good enough articles to publish.