Nikon buys them. Nikon puts it in their entry level DSLR. Their cameras are profitable.
Maybe you missed today's news http://nikonrumors.com/2015/02/07/nikon-had-another-bad-financial-quarter.aspx/
As said elsewhere, Nikon has a different crop factor, albeit the 1.5 crop sensor could be used in a 1.6 crop camera with pixel loss around the edge. Canon has the scale of "sensor requiring" business behind it to be able to afford R&D on its sensor business, where as Nikon is a small brand of Mitsubishi thus will be competing for R&D from the parent against much more diverse range of markets, notably cars, aircraft, space, banking etc... Canon's key competitor will be Sony, just as Apple competes with Samsung... I note that Apple has done just about everything to rid the iphone of Samsung sourced parts, go figure.