It would save them the hassle of replying to tons of emails from people asking where their redemptions are!
What happens if the signing never occurs? Has that happened before? Is there a reasonable deadline?
I don't recall this ever happening with Select back in the day, the case-hit signature was usually a redemption but I always assumed that was just a way to keep the big value signed cards safe out of the product until someone redeems it, if that makes sense.