Every plurker has his/her own karma value. It is recalculated every day and can be within these intervals:

High karma also gives you access to exclusive emoticons such as:
*hug* *kiss* *lol* *bye* Find out more...

Some tips on getting more karma:

What will lower your karma:

A good rule of thumb is to plurk like you have something to say/share. Plurk spamming will only force your friends to unfollow you and trigger the negative karma effect.