Hi Prasanta,
First of all welcome to the IRC. If you want to earn from this site you have not to do anything more except referring peoples to the IRC and writing articles, reviews, news, announcements, etc.. You can earn by adding link of IRC to other site and by posting new website links, new products details. Even you can earn from Ad-sense revenue sharing program.
Happy earning.
With Best Regards,
Azay Patel