Signature compaign is the easyest way to earn bitcoins. You can create miltiple users and talking nonsense on forum just to build up your rank. When you'll be sr. member and above, you'll earn quite some money. When you'll have 2 bitcoin, go to bitcoin casino, put 2 bitcoins on single bet, and win. Simple 
you'll probably have all your accounts perma banned and will lose your bet, and end up with nothing and hated by the forum.
Don't do it. At least try to make some sense of your talkings and never put all your earnings in a single bet