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I agree with Andy, it totally depends on the type of data you are marking up structurally.  For example product pages would need different markup to share quantity, price, reviews, etc versus some of your main company data like address, phone, etc. If you share what data you are marking up we can better assist you as to which pages should get code added.

Just a quick check to make sure that you're using the same subdomain in both cases. Could the campaign be for non-www and the site is ranking for the www version?