It looks quite explicitly designed as a short-term temporary license for the period when the main paper is unpublished and you'd be expected to keep the code no

It looks quite explicitly designed as a short-term temporary license for the period when the main paper is unpublished and you'd be expected to keep the code non-public (due to e.g. reviewing anonymity requirements), so the basic open source freedoms are explicitly not included. I would expect that anyone wanting to actually publish their code should publish the code with a "proper" license after the reviewing process is done and the relevant paper is published.