I don't put amazon ads on all my hubs, depends on the hub. My hub on Flying Cheap to Costa Rica doesn't have any amazon ads. I put quite a few on the vermicomposting hub.
If you check out the hub on How to Fly Cheap From Vancouver to Costa Rica you should see just one Amazon Ad about a guide book I really like. I haven't put too much time into Amazon yet, but will likely add amazon products to the hubs down the road.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.