how mouch amount we can earn per hour

It differs from person to person and also it mainly depends upon the quality of post. If you make 20 quality post then ur earnings will be good rather that posting 50 one liner post. Even if you write paragraphs and paragraphs, it should be meaningful. Right now I am earning around .30 cent per hour. I know its very low and its might take some more time to increase it..

it depends how many response u have posted

It varies from person to person. It depends on how much you are posting and if it is quality content.

Well I've only been getting paid .05 a response. It takes usually 2 minutes to post a response and everything. So at the best I could possible only make $1.50 an hour. I think the best way to make the most is by referring quality people. I've referred 6 people so far and have only got .03 from them.