Why are Signature Campaign prices base on the rank?

[melisande]

Why are the payouts in sig. campaigns based on the user's rank?

Code:

Rates: 
Hero member : 0.0015BTC per constructive post
Sr. member : 0.0013BTC per constructive post
Full member : 0.0009BTC per constructive post

I think it should be equal for all the user's. Whats your opinion?

People that offer signature campaign programme belief that the high your rank the better your post and that you are already an experienced member of the community and also you have people that could love their company just because you are wearing their signature.

[lorylore]

Basically hero members must have more posts that newbie, so the price should be higher for heroes