Movie - Just wanged my head with endless Deadwood

Since I am not cable-rich endowed, I am late to seeing many of the fancy items on HBO or other rich channels. As a late joiner, I recently got the entire DEADWOOD series on DVD. This show was and remain tops on my list of EXCELLENT SHOWS and deserves frequent viewing to appreciate the modern era (maybe). Why was it canceled? Must not have made enough money for the moneygrabbing, backstabbing, vapid owners. Deadwood where fiction and non-fiction ride the same horse.