If you've messed around with Referral Ads you may have noticed they can look a lot like regular Google Ads. As for how many Referral ad units you can put on a page the program policies state... Q. How many Referral ad units can you put on a page? A1. Total of TWO. A2. Two for Product 1, Two for Product 2, Two for Product 3,...
I would suggest you to contact Google directly. After reading the above excerpt, I think A2 as the correction answer. But I doubt whether Google will allow stuffing a page with that much ads.
There's 15 categories of products. Total Products = (a 5h!7 load). So Shareef, are you saying the Total referral units on a page = 5h!7 load x 2.
Two referral units per product are allowed. Not sure if you can promote more than 2-3 products per page. Why would you do that? These referrals just doesn't convert very well
2 referals per product on a single page. As for CPA ads, you'd want to make some dedicated pages with well written recommendations for the product to make the referal work for you.
if you are going to use referral ads on your site, it's better to make a special pages for the referral and you can add one referral ads on this page