I don't know much about SEO and marketing but I have a small website that makes money with ads. I was happy with my income until adxpansion started lowering my CPM without any apparent reason. The first few months I had a CPM of 0.19-0.10 this month I have 0.06-0.04. Every month I get more and more visitors and clicks, all from the same premium countries as always. All users are organic without any ads. But I earn less and less. Do you know why this can happen and how I can fix this?