I'm saying I doubt they will ever offer it precisely because it will conflict with their paid offerings. The fact that it takes its hardware is a great excuse to not give your customers the option.

I know GPS time sources have been available forever but a fault tolent database needs a backup. The US GPS is incredibly reliable but there have been multiple issues with both Glonass and Galilio.

It sounds like Google has an additional time source making this possible, probably a highly miniaturized atomic clock, possibly on a single chip. There's no way they're running on GPS alone