Do social sites with karma need a decay function?
WarTheatre: This is only a problem if there are very strong mechanisms in place that encourage/force people to actively compete for karma so that they don't risk losing their status. For instance, if high karma people are given more exposure or special benefits (early access to content; free stuff, etc.), you can bet this will lead to an increase in active karma manipulation. People will simply act accordingly to get better karma, which might not always be preferably depending on the type of community you run.Karma is very important to people online and fooling around with it can cause hurt feelings. After all, Karma is often the only explicit reward that community members receive and is a way of being recognized for being a productive, helpful, nice and ultimately good member.Regards,
WarTheatr