To join in signature campaign for earn extra money in this forum, you must have great knowledge, active contributing, and have high rank ( at least member). You should start to focus for contribute in this forum than thinking about money. If you always think to earn money in this forum, you will never get it.
We are all here because we want to earn money
No, not everyone. Have you seen sir @Vod in this forum? Well, he is one of very great contribute member in this forum, earn 2000+ merit and have good & constructive post. Well, I never saw him join signature campaign to earn extra money, although he deserve to join in any campaign if he want.
If you want to get money, I suggest you to get a job in real life. This forum literally is for discussion about bitcoin or altcoin.