rpm drop

Hello everyone, I recently got my channel monetized and for the last 3 days my CPM is at 0.00$ but there are still ads running on the videos. Any info on this is highly appreciated. Thanks in advance. Regards, Naga

Since January 2016 my page RPM has dropped from an average of $1 in 2015 to $0.35 in the first half of 2016. I've change nothing on my channel, but I'm seeing that fewer and fewer of my videos get suggested. My average retention time if about 1 minute, 40% of the views came from US and Canada...