Why would one respond to the discussions?Would it fetch me?

Yes you earn money for responding to other peoples discussions. You earn for ones you start. You also earn for pictures. If you don't respond to other peoples discussions then they aren't going to want to respond to yours.

basiclly yeah. you are paied for quality responses and topics. people also repond to either help people or get their say in on a debatable topic. thats what people like about these sites. most people spend time on forums discussing things for no money what so ever, but this site is paying you to do the same thing you would do on any other this foum.