According to the article the digital font was created before the recovery of the original letter forms, and seemed to take quite some time. So it's more than ju

According to the article the digital font was created before the recovery of the original letter forms, and seemed to take quite some time. So it's more than just "copy-pasting". I'm not sure how a lawyer would interpret that, but considering the original font is 120 years old I think it was fine to use it as a basis for something they charge for. From a practical standpoint it would cost me less to just buy it instead of manually recreating it for myself.