Karmaloop Rep Codes
Rep codes are the most common, there's over 100,000 people currently advertising Karmaloop!
Why would people do this? Simple, each representative has their own code and when someone uses that code the person purchasing from the site will save 20% off their order and the person who owns the code will then get a percentage of what the person spent!
For example: I went onto Karmaloop and my order was $100 and used the REP code Samyo12345. I would then only pay $80 and the person who owns the code would receive $5.