Probably the same reason I watch hockey games on the NHL network from 1999. There's nothing else on TV and there won't be any hockey until probably 2017 by the way the negotiations are going.
Home Depot has more variety...Lowes has the higher quality stuff (at a bit higher price). Honestly, i prefer Ace Hardware, but they are slowly becoming extinct (i love places where an 80 year old man can teach you how to shave 2 hours off a project and be 110% right about it!)
Would you sign a contract that gave you a new iPhone each year one was released as long as you never purchased or used another device for the rest of your life?