What do you mean that I have to invest my time, and how do I join one?
you need about 3 hours a day for posting, maybe more if you are still not confident with this place and you don't know much, you can't simply post garbage, you need first to have a basic+ knowledge about bitcoin in general
then you need to join a campign that pay well, like bit-x for example, but you need to wait a bit, because i think they do not accept new members for now
My campaign (see my signature) is accepting members, but I'm not sure if newbie users are allowed. Even if they were, they would be paid less than higher ranks.