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.