Hello iam new in clickbank i want to ask wts the better for visitors ? CB only -or- CB with adsense? cause sometimes when you have nice niche site (domain + content) Some users of adwords Will Targeting your site
CB with adsense is ok and usually doesn't impact CB revenue, although I tend to give more prominence to CB and have adsense placed on exit points where the visitor was going to leave anyway. The end goal is to get the visitor clicking the affiliate link not adsense, so your placement strategy should have this in mind.
I think it is legal if you ad quality content (reviews), You can put Adsense with your Clickbank reviews. As you can I have a blog and I'm using Adsense and Clickbank both. you can see the link at my signature.
Many people use a combination of both and it doesn't appear to have any negative impact unless you go overboard with the ads.
I would suggest below fold and side bar ok for AdSense. Prefer rich media ads on bottom of side bar. Means if someone reaches that far he/she is about to exit. So give them a reason