All parents who leave on mat leave always just leave and hope for the best when they want to come back. I don't hold spots. If I knew I would have a spot for baby the following year they would need to pay full time for child currently in care and begin paying full time for baby when spot is open if it is earlier than needed.
I have had 2 families so far return after leaving. One ended up at a different daycare for a month or two. I called and told them 2 spots opened up and they came back.
I need my spots full so I cannot take a cut in pay to accommodate anyone.