What is the average commission paid for an e-commerce retailer via commission junction? What is an average conversion rate?
How do you define an ecommerce retailer? They are ALL ecommerce retailers! Giving you an average wouldn't mean much - household goods etc. tend to be 4-6% or so, electronics are usually lower than that, but specialist retailers (e.g. auto parts) can fetch you 8% or more. For physical products don't expect much more than that. It's a volume game with physical products.