I have seen his/her post about how happy he/she is because there are many people from 3rd world country who do a good job and contribution to this forum and make money from it, and the money is considered big in their country. If this system happened, then the poor will be troubled a bit if they want to join the sig campaign. It will be like a money game, one who has money will have a higher chance to be in the game.

Let me post this first and i will find theymos’ post. This reason is just a conclusion from me tho.

Okay, this.
https://bitcointalk.org/index.php?topic=2986106.msg32203954#msg32203954