Schools like City do lose out by going right up to the deadline and honouring all offers.
If they promise to honour all offers, they will have to make fewer offers. Even with this, they may still get too many acceptances for their listed buildings which cannot be altered, or find they haven't enough because 7/8 of those they offered to had another top school as their first choice in the end. By the time they go to WL, many of those (who also had another as their true top choice) have gone elsewhere and they have to accept a lower standard or simply not fill.
They are losing out. Their exploding offer system means they can get the right number. They can over offer and know they can accept the right number. They have effectively gone to WL in advance, by over offering, but only to the point they are happy to do so. And they are full before the end of half term, whilst other schools face weeks of uncertainty over numbers, plus the knock on financial costs of that over many years.
Openness about the policy is key and the information is put very clearly. Why any parent about to invest in a project effectively costing over £100k wouldn't carefully read the terms of the offer and thoroughly research what has happened in recent years in response to the schools approach, I simply cannot understand.
Surely people wouldn't buy a house without thoroughly investigating first? Surely people wouldn't expect to get a sought after first class seat on a plane, which know seelsmout within hours, three weeks later?
Parents had the info. There might have been lots of cock ups over interviews and other paperwork, but the info about when they had received enough acceptances, other offers would be withdrawn was clear. No one could know when that would occur - not the school nor the parents, so if you really wanted a place, you would do everything to get that in - either queueing, or as others have said, by sending the deposit electronically and the paperwork too - yes, it required a bit of pre-planning and thought to do so, but if it's your first choice and you've read the terms because you're seriously interested, surely you act and don't just hope or assume you'll have 4 days or a week or 3 weeks. Although it's hard, I think really,some parents messed up here if it really was their definite top choice - they took their eyes off the ball and either didn't read the terms or didn't look into what had happened last year, so heeded the warnings that time really was of the essence. If you understand the process in the year before, when you apply, you simply don't plan a holiday over offers time, or leave yourself in a position where you still don't know if you want it - you respond to the circumstances to make sure that you can get a place. I find it astonishing that people didn't do that. And I expect the same thing will happen next year too.
Is it the equivalent of not getting your state school application in on time, or not returning the acceptance form? I don't know.
It's a real shame for those families who really wanted places for definite, but I think they have to take responsibility for it rather than blaming the school. Some people certainly will pull out later once state school offers come in....so if it genuinely is top choice, sending the paperwork and a cheque and an email stating it is definitely top choice, might still result in a place. Of course, that will be later from the WL - the experience many other parents have to go through with other schools because of the non-exploding offer system that those schools operate. For those who weren't WListed, but suddenly find themselves in that position, perhaps it then clarifies a little how unpleasant that position is and that City mostly avoid it by their approach. And finally, when City do go to their WL in the end, for a few places, perhaps as always they will find that actually lots of those people then turn down the offer - again, illustrating how this happens to all schools and the problems it causes. Parents are happy to be the beneficiaries of multiple offers and choice and to turn down lots of offers - but they simply don't really consider the effect this has on the schools and other families.