One of the reasons we didn't go with buildjet was their concurrency limits (https://buildjet.com/for-github-actions/docs/about/pricing#c...) and the pricing on extending those limits.

We are a small company but our autoscaling cluster for GitHub actions on aws will scale up to >500vcpus during the work day when there are a lot of prs going in.

I don't see it documented anywhere, what are your concurrency limits on accounts?