Maybe if Signature campaings dont required that monstruose ammount of posts in order to reach the minimun required to be payd, maybe, we will not found those type os posts.

If they force people to post 20 or 25 post per week, or they allow 15+ post per day, then people will do what you see, IMHO thats the main reason about it, anyway i will never be against signature campaigns is a great way to incentive people gain some satoshis and in some ways help this forum too.