what are the secret of earnings..

Secret? Interaction is the key! :) and creating your own discussion

Just have fun here.make friends..

There is no secret, interact, build relationships. Do not just post things, visit with and make comments on other posts. I have not looked at your posts so I do not know if there is anything you could do differently.

Have fun through interacting :)

The way you get money is by writing interesting posts that get a lot of interest from other members. When they read, like, comment or respond to anything you write that will earn for you. A post isn't just a discussion it can be anything you write such as responses/comments on other peoples discussions. Just try to write interesting things and spend a bit of time responding to other people as that helps you make friends.