For Google, it's a good bargain... they collect new designs of processors for free and for them the fabrication cost (a few thousands $) is like a drop of water in the ocean.
This said I doubt this will be a massive production. First there are selective criteria. They will not build anything. It has to be relatively quality design so probably they'll only produce a few dozens per year. Seriously a talented chip designer cannot find $2,000 to manufacture their own prototype?
