I think that the only viable approach is to do your own searching both widely and deeply and compile your own statistics. When you rely on easily accessible in

I think that the only viable approach is to do your own searching both widely and deeply and compile your own statistics. When you rely on easily accessible information then you are seeing the same data as, potentially, many others do. In my experience, all the low hanging fruit has been picked over. The harder something gets the less competition you have.