If your site is search in search engine and your blog 6 months old then you may apply for google adsense.During this period of time you can start earing using adbrite
adbrite is real marketplace and its pay as well.When you reach your earning limit then adbrite pay you through check.adbrite pay for all country.
Make money from ads on your website:
- Get quality ads from top brands like Live Nation, Verizon, and Chevrolet.
- Maximize revenue with banner ads, text ads, and advanced formats.
- Approve and reject incoming ads, or auto-approve for maximum ad fill.
- Empower your user community with the “Your Ad Here” link.