I still don’t get it. What is a “project” and how does it differ from a “repo”? If they are the same thing, isn’t every project/repo going to cost at least a $1?
A project as described here refers to a "Cloud Project" which is the basis for creating, enabling, and using all GCP services including managing APIs, enabling billing, grouping resources, etc. Within a project, one could have tens or hundreds of repositories. With 6 users on a single project, you would pay $1/month total (because the first 5 users are free) and all those users would have access to every repository in that project.
I appreciate your feedback that you find the pricing model and project concept difficult to understand. I'll bring this back to the team and we'll look at different ways to improve this.
https://cloud.google.com/resource-manager/docs/creating-mana...
"Project-user" here means that access is counted per project. So if you (x@) use GCR for projects A and B, meaning you check in/out code as x@A and x@B, that's two "project-users".
Disclaimer: I work for GCP.