The most recent change I had made, was to limit the effective window to 30 days rather than the original 90 days. Now, all the (-) are no longer in the window. I was under the vague impression that the member rating system would work somehow, even with only (+) votes. Such does not seem to be the case.
One of the problems with using either +/- or just + ratings is that it isn't compared to the whole number of posts with neither rating.
If you want just + ratings then the member rating could be
(number of + rated posts / total posts) in last 30 days
either as a percentage (%) or per mille (‰.)
Edited by RAZD, : ()