Originally Posted by
robsaw
It could cost them on their balance sheet. Vouchers that expire fall off the books as a liability once they expire and become "breakage" - WJD that don't expire sit on the books indefinitely.
True, though they could place an expiry date on those WSD like they did when they were offering occasionally 'time-limited' bonus of WSD 50. Usually they were gone in 48 hours if not used.