And by investing time and effort only, bounties and signature campaigns are on the first seat. Now, I don't if there are still some people who wants to do this but, there is this thing where you're just going to answer some questions, play some games, or even just confirming captcha. And it is called Faucets, where its like a low budget thing for mining, and the worse part of it, is that you really need a lot of time for you to be able to earn a decent amount (for me its still not decent).

Now the second one is by providing services, if you're like those people who happens to have phenomenal skills, like serious editing, selling different kinds of designs, programming, or even managing a campaign. Name it, and it will be paid through Bitcoin of course.