Paying your own way defeats the purpose for their goals here. They are looking to build an open-source reposiory of tooling and designs. For that, some standard

Paying your own way defeats the purpose for their goals here. They are looking to build an open-source reposiory of tooling and designs. For that, some standardisation is required. If you are looking for a commercial chip spin, don't expect it to be free. This is a really cool and unprecedented open source project by Google.