90% is from the US.
Its a US site. I don't get that much international traffic.
My site renders great on all platforms. Its a responsive design.
I was getting 120k-140k impressions last year. I am getting 30k now and traffic is more now than last year with the same ad spots.
I understand they stepped up their invalid clicks but 80% of all my clicks? No way.
Other than small site changes (colors) everything is the same. My other advertisers (direct) are happy with their performance and perform the same.