A question on the Prime Day sale happening today.

I’m buying 2 items for 30k & 40k. If I buy them together I get a discount of 7k with my Diners card. I’m trying to see how I can maximize my returns and get the 33% + 10%. Now I can buy only 1 item at a time through Smartbuy. So if click on the “Buy now” in Smartbuy and it takes me to the Amazon page where I buy 2 items. Would I get 33% back on both the items or just the one I clicked on in Smartbuy?

The 10% offer is pretty good but I don’t want to jeopardize my 33% for that. So my question is - what happens when we go through Smartbuy and buy more than 1 item at Amazon or any other retailer. Do we get 33% on the whole amount or just for the item we selected on Smartbuy?