How to earn money from weblink

I think you may have listen about weblink but you may not know that you can earn money by contributing in weblink type answer. Like some website pay money if you contributed answer in yahoo from his website.
For example if you are working on indiastudychannel.com and want to earn money from weblink then give answer of question from link below and answer content should include link from indiastudychannel. 

Same way many site pay to work like that. You can earn money from google AdSense too using weblink that type of site is webanswers.

 I hope you get good idea about earn from weblink. You need to open account in yahoo website and indiastudychannel.