Sarting more discussions will earn more ???

I honestly don't think it really matters if you start the discussion or not as far as how much you are earning. From my experience you earn .01 for every post you make and your earnings will show up 24 hours after you make the post. I think also, that you should post on subjects or topics that really interest you, because you can go into more detail and give better answers as opposed to just randomly posting to any comment. Happy my lotting.

i have the same question to ask...............is it ok just to start discussions rather than replying or responding to others??????

I don't know. When I have some interesting discussion I ask. But most of the time I'm responding to other discussions.