I propose adding a function of karma decay. Over n-amount of time time, x-amount of karma is lost. This is also useful for letting people know how great you are.
That would just weight the karma score to favour more recently obtained karma. That function is already performed, in a slightly different way, by the last 30 days karma score.
Has anyone yet mentioned or reported that for the last couple days, the "karma for last 30 days" is showing zero for everyone? And that we no longer can see the top contributors for the last 30 days either?
Do we have an explanation or estimation for a bugfix on this?