A couple of weeks ago when I was averaging around 1000 views per day, I could expect to earn around $1.25-$1.50 for every thousand views. But now that I am pulling around 3000 to 5000 views per day I am only making around $.60 to $.90 per thousand views. Could someone explain why this is or what changed? About half of my viewers are in Canada and the other half here in the U.S. but it has always been that way and hasn't changed.