Ways to make money:
1. To participate in a signature campaign.
3. Win a contest.
4. By selling your service.
These three are the best ways to earn some money here on our forum. Campaigns come and go, if you can't be in on a campaign, but you really wanted to, then you should do the work first.
Rank up. Post the most quality that you can.
Winning a contest will depend on how you witty you are and how you worked hard to beat other competitors.
And of course by offering your service. Just provide and show your best works then the offers will come.
I think joining a contest is a good idea if you're still in a low rank you cannot really join a signature campaign since most of the signature campaigns today required a high rank.
Joining contest most of the time have a low requirement as long as you have the skills you have a capability to win and most of the time it has a high prize.