I just don't get it, why, WHY?

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Ok so I keep trying to create and reply only to posts that intterest me and when possible with information and as much as I have to say. I've tried to help quite a lot of people out, and a lot of people actually thanked me.... But my star is only a 2, yet I found a member that all he does is cpy and paste jokes for maybe 3 weeks and he has a 3 star. Isn't that cheating, All I know is it's not fair at all! It really makes me sad!