I had about $165 last month, and this month about $120 by far, but the problem is I add 4 domain names and about 50 blogs. It's seems like something wrong with it. I have doubled revenue in the first 10 days of this month, then I deleted a lot of posts of my old blog which generated by WP-O-MATIC, then the CTR and ad impressions drop a lot. Like yesterday, I had 1000+ ad impressions, but only less than $4 earning, that's crazy! And the other 4 days I didn't check out my account, the earning were $4 total! I am not sure what happen now, I expected to duplicate my old blogs and try to earn more, but it doesn't work as I thought. Man, i am kind of worry now, if I only depend my day job, then I will never overcome my financial problem and get a REAL life.