Yes - your waitlist will expire and you can only get a redemption by periodically checking in those 4 days.
alright, if it doesn't clear 30 minutes before the deadline, then I'll just call them and ask them if they can release one of those I fare tickets to redemption. And tell them if they can't release an I fare ticket, despite most of the plane being entirely wide open, I'm booking SQ return in J. I'll send them the receipt this time. I feel like what
christep says is right.