:'3 the numbers on your stats screen! The more you have, you unlock emotes and other functions like...Naming your plurk page!

Though you can just cheat and get scripts for other emotes like this > s726.photobucket.com/alb...

it increases as you plurk and respond to plurks :>

but if you stay too much inactive the karma drops... my karma is a rollercoaster... XD

Ahnm I see, thanks! ^_^