Aslong as you have the time to contribute to the site everyday, you can sign up with a signature campaign, maybe on multiple accounts, and earn enough to reach your goal.
a full member account could earn more than 1 bitcoin a year.. so I think one account is enough for one bitcoin..atleast by that he could really spend enough time in his account to make a good post..
I believe so that we can if you will concentrate on bitcoin no doubt you can if you ill do all the stuff like signature campaign, trading and gambling discipline and wise enough to do everything you can even much better if you are focus to do so..
There are many other ways too to earn bitcoin, if you go to services section then you will find multiple ways to earn bitcoin, if you have multi skills then your earnings would be much higher.