What is benefit of running $0.25 CPM campaign for targeted site.$0.25 includes cost of any click during M views ?
Yes, the CPM is the same regardless of clicks. You pay the amount you bid regardless of how many people click on your ad.
In my personal experience the $.25 doesn't get you much traffic. I was bidding between $.50 and a $1, and overnight I lost a lot of money and received very few clicks. I learned the hard way...don't repeat my mistakes!!!
Depends on your ad copy/image and the site you're running on. I've found some real gems - $0.25/CPM with a CTR in the mid teens.