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Note, these sites will have all unique content but affiliate product/service will be the same.
That said, I would rank 2-3 on the top terms, and move on to another area. If you are successful at SEO, why not spread the love? Makes no sense to go for one niche, all 10 spots rather than hit 5 niches with 5 top 2 spots....peace
With this affiliate program i have to use the exact product photos and text. So even though my site logo may look different the products and all discriptions are exactly the same.