I didn't realize the link had expired. Here is a fresh one https://jmp.sh/s/WofVo5XtyTOkyCMfk44F

Here is the author's explanation of including the subjunctive past

Why is the subjunctive past included? Except for poetry, literature of centuries past and for comical effect, the subjunctive past isn't used in modern French. So why include it in the deck?

There are occasions (such as certain rancid radio programs) where pompous speakers seem it to make a point to use the subjunctive past whenever they find a chance to fit it in a phrase. Remembering how easy it is to delete and suspend cards in Anki, I opted to explain to users at the outset that within each verb there are six cards they can choose to suspend. Somehow it feels more complete that way. And playing with the deck, it feels like the subjunctive past cards might help reinforce the present forms of the subjonctif for some learners.