What it does: A hack that gives users chances to re-rate other members.
Curretly, once you rate someone, you can't rate him again.
But sometimes you want to rate him again.
Because as you get to know the user,
your evaluation often starts to change.
the hack gives another chances to rate other users in a given period of time.
Admin can set the time interval.
(e.g. users can re-rate each other every 3weeks, 1month, or whatever the interval admin chooses.)
The rate should be cumulative, which means
the rate does not reset every, say, 3weeks.
It's just gives a chance to rate users again.
