My only guess is they have a parallel skunkworks working on the same thing, but in a way that they can keep it closed-source - that this was a hedge they think they no longer need, and they are missing the forest for the trees on the benefits of cross-pollination and open source ethos to their business.
I'm curious about this. Sure some CUDA code has already been written. If something new comes along that provides better performance per dollar spent, why continue writing CUDA for new projects? I don't think the argument that "this is what we know how to write" works in this case. These aren't scripts you want someone to knock out quickly.