The draft text also obliges the Libra Association and the issuers other significant e-money tokens, to redeem, at any moment and at par value, the monetary value of the e-money tokens if the holders decide, either in cash or by credit transfers. The rules also impose the prohibition of granting any interests to holders of these digital assets.
In this context, it looks sane to me. Tolerably so, at least. You issue tokens, they must be backed by something.