It's because it's actually become viable. Up until recently, nobody was looking to recycle batteries, nor the material they are made from as it was cheaper and easier to simply throw them away. Now? People are starting to look toward the future, and finally understanding that there isn't an unlimited amount of the resources needed to make batteries, as well as realizing that there is a pretty decent supply sitting around as throwaway waste. When the newer batteries first came around, they didn't look at recycling, just how to make them smaller, and more efficient. Now that there are so many batteries being thrown away, various companies are looking into recycling or extracting the material needed out of them. Kinda like the oil companies do now in difficult to drill areas. They discover the oil and keep the lease on the land, waiting for the prices to go up until it becomes profitable to drill there. Recycling is still expensive for the newer batteries, but it's starting to look like recycling can be profitable, even more so than mining.