But the reviewers have no knowledge of this choice (nor should they really). The parent was suggesting that Universities bar their faculty from reviewing paper

But the reviewers have no knowledge of this choice (nor should they really). The parent was suggesting that Universities bar their faculty from reviewing papers unless it was an open-access publisher. I haven't published in a Springer journal, but others have the authors make the open-access determination only after the paper was accepted. In which case, the reviewers would have no idea about if they were reviewing an open-access paper or not.