Bug report first: I might got the same problem with the not voting again. Right now I'm at 30% Voting efficiency and for quite a while at 100% VP. The last five votes I casted were over 24h ago.

Some Feedback:

• Feedback is very important in designing stuff. Feedback and discoverability. https://99percentinvisible.org/article/norman-doors-dont-know-whether-push-pull-blame-design/
  For instance, a feedback that you gained X amount of shadowranks compared to the week prior would be interesting. With that someone would see the progress and he is more likely to stay. (Less of those "Is SB only taking votes from me?"-Questions)

• Also a complete overview of casted votes (Manual votes and marked shadowbot votes) could be interesting and probably settings for users over FVL to sort and filter the data of votes and Co..

• Prognosis could be something to: How much can someone gain with a voting efficiency of 100% compared to 50% from SB? What would happen at Shadow Rank 50 compared to 30 etc..

• Also now it "feels" for me like that posting daily is the way to go to get the most. Posting less or not frequently seems to hurt the reward. Looking over the data of the casters it seems that a high number of posts correlates with a higher earning on the same shadow rank and with sometimes even less contribution.
  For instance, looking at Steem Basic Income, https://steemit.com/basicincome/@steembasicincome/steem-basic-income-a-complete-overview

"Each member's total voting weight is based on the shares that they own, but distributed across their weekly posts. This ensures that weekly income delivered to each share is consistent for all members, without putting pressure on members to create content every day. Since some members are quite prolific, their voting weight for each post has drops below 0.50%."

Based on that it wouldn't matter if someone is posting once per day or once per week. Reducing the optimization effort on the user side, because they don't have to post daily anymore.

• You are already mentioned that you wanted to reduce the load of the server, loading every information over and over is quite the overload and not necessary. But making the data available on demand could be interesting to some folks. I like to scroll through the data and to look at the Casters what they are doing and how they perform.

• Updating the Blacklisted site (last time is two months ago) and provide the rules after someone would end on that list. (Multi-Acc, Spamming really useless posts...) And also give people on that list the opportunity to get back from it.