Identity Server 4 - Fork

Is there anyone here that is interested in helping to maintain a fork of Identity Server 4. The next version of Identity Server is no longer OSS and a dependency on this is a risk without a clear path toward the future.

Or does anyone know of a maintained fork already?

Also, is it the idea of the dotnet foundation to promote commercial non-OSS project here? Probably the project page of Identity Server needs an update:

I think this is a crucial piece of infrastructure in the .NET ecosystem and not having an OSS solution is not good evolution.

Disclaimer: All respect for the original maintainers of Identity Server to take their project down this road, they are completely in their right to do this.

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