Hi Christina,
We appreciate your interest. The reason our customers use the Prediction Engine to augment lead scoring is precisely because (as you say!) title, industry, and revenue aren't enough, by themselves, to find your most likely buyers - whether it's in RainKing, a competitor, or in Marketo itself. Instead, the Prediction Engine uses a host of other attributes like what technologies they manage (i.e. historical wins), decision making authority, pain, keywords - as well as demographic attributes if you wish - to rank who's most likely to buy. You get to define the criteria, so it's your logic and your rankings. If you have other questions, perhaps we can discuss directly?
Thanks!
Scott
sferrebee@rainkingonline.com