No, running software on GPL licensed systems does not make the guest software GPL.
But, The AGPL is “infectious”, and one bit of AGPL can make your entire project subject to the AGPL. It’s a legal nightmare and many businesses outright ban the use of AGPL software.
Presumably, they’ve just blanket banned GPL to avoid any ambiguity.
Because you’re only ‘exposing’ the port on the peer to peer network.
You “publish” a port to holesail, then clients have to create a local proxy via holesail before they can access it.
I agree, It’s a dumb pointless claim. But I don’t think it’s misleading.
It looks like holesail is just tailscale, but on a much smaller scale. It’s not networks, it’s just ports.