The issue with those is when you look at the business the customer does to begin with. If they sell 103,000 laptops and you say "buy 100,000 CPUs from me and you'll pay 10% less" and a competitor sells 255,000 laptops and you say "buy 250,000 CPUs from me and you'll pay 15% less" and so on, always offering the deal where you choose between a discount for making >95% of your sales volume Intel or paying retail prices for CPUs, the fact that you're specifying that proportion of their sales as an absolute number rather than a percentage doesn't seem like it ought to change very much.