Back in 2006, when I was racking and stacking servers in datacenters, I was on Sun Microsystems website looking for parts.
I noticed they had "X311L", which is (was) a standard North American power cord, listed for >>$0<< with NO shipping fee. No way these are "free" and I have BOXES of power cables already... buuut, dripping in curiosity, I ordered 10 cables. A week later, a neatly packed box of 10 power cords showed up at my house!
What an innovative business model! :D