So, this doesn't appear to have been announced by google. It does seem to be real but the OP may be jumping the gun a bit.

The authoritative source seems to be the slides of this guy at google: https://docs.google.com/presentation/d/e/2PACX-1vRtwZPc8ykkk...

From the slides this is "current plans, subject to change". This is an 'open source shuttle process'. Shuttle processes are a relatively cheap way of making small numbers of chips (it is actually more costly per chip, but the fixed cost is smaller). There will be some kind of approval process, and I would imagine that there is a capacity limit for both the number of chips and number of projects.

(I didn't have time to watch the talk, so the above is just from the slides)