Correct me if I am wrong in a single web page you can have. Up to 3 ad units A max of 2 adsense search boxes 1 link unit 2 referals units So basically you can have 8 Adsense Javascripts per page? Is this correct?
You are wrong. Max per page: 3 ad units 2 search boxes 1 link unit 2 referral buttons for each product. Since there are 4 referral products you could have 8 buttons in total, although your site will look very spammy if you do.
4 adsense codes allow per page. 8 adsense scripts will be full on page , so totally site will be adsense ads. its again google TOS. its better you put only 2 codes and contents in each page.