I checked them .. Upload , Download , Forums websites ..

Your websites still new .. some of them not working yet , so i dont think CJ & amazon will be a good idea for now.
The best way to earn from your website would be AdSense for sure ..

You still have some alternate networks to work with like ( YPN , AdBrite ) , but i recommend to work with AdSense first.

About your upload website .. Most of big upload services like ( MegaUpload , zShare , Uploading , etc .. ) work with AdBrite from along time.