Hi Sander,
Please look at the presentation I linked to and Daniel's comment.
Looking at it right now. But I'm still not convinced that it is a good idea.
Please stop trying to conserve any more IPv4 addresses, IPv4 has reached a dead-end, let it die peacefully.
This is not about conserving IPv4 addresses.
Maybe not directly, but when the waiting list get incredibly long, it would mean that if you get into queue late you won't probably get any address. That what I'm talking here, a total exhaustion of IPv4. When giving out /24, there is higher chance that more subjects would get IPv4 pool, so it would last bit longer as the result. I would rather see policy about when we reach situation where there is no longer /22 to distribute than move all returned IPv4 pools after that into IXP reserved pool. Than no waiting list would be needed. But I'm pretty sure that such a policy would not pass as well. Martin