I'm not trying to say that your efforts are for naught, but this is something that I feel any "rating" efforts will need to consider. In my previous analysis of the blockchain, before SteemSQL was a for-purchase tool, there were many attributes that overwhelmingly identified bots/spammers/scammers, but also found valid users who were new and unaware of "acceptable" posting etiquette. The same will occur for providing rankings of valid users, except the "smart bots" will adapt to appear like valid users. The monetary incentive will always murky even the most complex and thoughtful algorithm.

I wish you all the best of luck, but I hope that expectations are tempered and considerable value is not weighted on any of these new scoring mechanisms until they are fully vetted. Looking solely at the top rank and bottom rank may be tempting, but sampling the middle ranks will be paramount to developing a truly reliable scoring method.