How do I earn money on here?

Actually, both. Starting new discussions and answering to other's posts will gain you money on this site. You don't have to answer everything, just the ones that you feel you can answer with something "meaty". An "I agree" to every post you see will not get you much of an earning, the site tends to look at how much you contribute to a discussion as to how much you are worth to them.

You can earn money by posting pictures to your discussions, starting new discussions, when others post in your discussions, and when you post in other's discussions. It is not necesarry that you write in your own discussion, but if you reply to what others say in your discussions, you will get more responses and earn more money. About 40 posts a day can give you a dollar. And the other thing is write at least 4 lines when you write, and write applicable stuff. you are given more money for nice posts. Hope this helps.