Yeah for many sites people dont click any banners and google text ads clicked very rarely on those sites.
That's really huge Traffic if you manage to get good content in your site so visitor, visits few more pages of your site. Than I imagine you will earn a huge amount of money from that approx. 2,000k usd$.
Not sure this is correct - I think you may be getting bounce rate and exit rate confused. If your homepage has a high 'exit rate' that means only this page is being viewed before closing the window. A bounce rate is where the user is only on the first page of your site they visit for a very short period of time (not sure what it is but im guessing 1-3 seconds?). High bounce rate = bad, high exit rate = not always bad.
and: There is no time frame involved when visiting a site. As long as no other pageview was generated by the visitor, leaving the site counts as bounce.