You should get in touch with @curie and ask them for curators stats for rewarding exceptional content on steemit and somehow incorporate this into this reputation system. Curie curators put in a huge amount of time and effort behind the scenes with little benefit to their rep, in fact often the amount of time spent curating prevents them from blogging to help drive their rep up.

Would it be possible to incorporate the amount of work they put in to help user retention within your algorithm @steem-ua? I'm thinking taking the curie Approval rating and curation score and somehow calculating how much engagement they have driven simply by doing what they do.

Full disclosure, I'm a curie curator ;-)

P.s. I really like the system and the vision behind what you are doing here, I have delegated 50 sp of my stake. I stopped using bidbots on principle around 8 months ago and my crawl up to rep 60 has been slow and painful despite only publishing medium to long posts, mainly creative writing which I feel is to a high standard. There is definitely a need for a rep system which disregards the influence of bidbots and it seems you've managed it! Awesome job :-)