join signature campaign, Qtum is the highest payrate for now, you can earn 0,02 in a week (member).
and keep you page at service page, some people love to pay 0.0001 just to sign in their website or comment in website
or if you have really good skill, there are some job for people making design or website thing.
the best idea how to make 1 bitcoin in a month is not here mate, go outside and get some job.
You can't rely on signature campaigns all your life they come and go and is not something that should be made as a living. It's just an incentive to people who post on the forum. It's not what you want to live for and not even fulfilling to do. If you're just in it for the money, then go. I would recommend just doing great job in the forum like offer your skills.
Easiest way is to offer your skills and work and receive/buy Bitcoin as/from payment. Signature campaigns have very low pay rates and will be only interesting for people in countries were the average wages are low as well.
I also feel that signature campaigns are encouraging spam posts. But I would not ban them, because they still contribute to Bitcoin-economic activity.