> In quantities of hundreds of thousands or millions

Sorry, I do not know anyone who buys millions of high performance NIC cards. Maybe 1 or 2 supercomputer labs in the world? And with that in mind, I am not sure the price break a company will provide to someone buying a million $500 network cards is super important to me?

> That adds up to a significant number, even if it's "only" 10%-20% per server, and you're probably overestimating the cost of the rest of the server since large companies are able to get steep discounts on almost everything in the quantities they buy in.

Nope, I definitely knew what the whole server cost.