Thanks for the update. There's no perfect system, but I can see you are trying to improve. I thought linear rewards could be a bad ideas as masses of bot accounts can have more impact, but people are working to counter that. At least the data is visible to analyse. I think reputation could be used to limit the posts/votes an account can make. That would reduce spam and mean you have to earn the right to use the system. It would hamper bots unless they had community support.