After a long patience of waiting, WordPress.com bloggers can now earn advertising revenues on their blogs. Automattic has just announced WordAds in partnership with Federated Media publishing. It’s their equivalent of Google’s AdSense.
However, not every blog can carry WordAds if not to meet with these requirements:
1.) Publicly visible blog with custom domain (i.e. juntariman.com)
2.) Level of traffic and engagement (to be determined by automattic)
3.) Type of content
4.) Language used on a blog
Your application for WordAds does not guarantee you shall be given the privilege to carry the service on your blog. It would depend everything to the people there in automattic.