It works the same, the price is just $0. I'm sure I'm missing nuances since I don't know this resort's business, but here's what I'd propose.
You let people register interest by Monday (potentially weeks in advance). You draw N lots on Tuesday. People get an email, they have the option to reserve a space and 24 hours to exercise it. M people do so. On Wednesday you draw N - M lots. You keep going until either you've assigned all the spaces or you've run out of time.
People will still exercise a greedy strategy, and they might cancel their interest ahead of time, but if the lottery hasn't started that's a free operation. If they click the link and indicate they aren't interested any longer, we can offer the spot to someone else immediately. If they never click the link, then it gets bumped to Wednesday. Hopefully that's tolerable.
How far you may register in advance and how long you have to exercise your option are variables that you can tune. If you're getting overwhelmed and failing to assign spaces, you reduce one or the other.
Last minute cancellations or spots that people repeatedly failed to click the link for, need to be assigned ASAP to avoid a dead weight loss; for these, you can fail back to the old system. Maybe you email everyone who hadn't gotten a space, and the first to click the link wins. If that were the edge case instead of the norm, it probably wouldn't be a big deal to give it to the bot folk. At that point, they're playing an important role in making this market efficient, the sort of HFTs of the ski resort.
Alternatively, you can do just one round and then go to first-to-click. That gives the people who aren't botting room to breathe, at least.
(After typing this all out though, I do see that this is conceptually simple but complex to implement.)
You let people register interest by Monday (potentially weeks in advance). You draw N lots on Tuesday. People get an email, they have the option to reserve a space and 24 hours to exercise it. M people do so. On Wednesday you draw N - M lots. You keep going until either you've assigned all the spaces or you've run out of time.
People will still exercise a greedy strategy, and they might cancel their interest ahead of time, but if the lottery hasn't started that's a free operation. If they click the link and indicate they aren't interested any longer, we can offer the spot to someone else immediately. If they never click the link, then it gets bumped to Wednesday. Hopefully that's tolerable.
How far you may register in advance and how long you have to exercise your option are variables that you can tune. If you're getting overwhelmed and failing to assign spaces, you reduce one or the other.
Last minute cancellations or spots that people repeatedly failed to click the link for, need to be assigned ASAP to avoid a dead weight loss; for these, you can fail back to the old system. Maybe you email everyone who hadn't gotten a space, and the first to click the link wins. If that were the edge case instead of the norm, it probably wouldn't be a big deal to give it to the bot folk. At that point, they're playing an important role in making this market efficient, the sort of HFTs of the ski resort.
Alternatively, you can do just one round and then go to first-to-click. That gives the people who aren't botting room to breathe, at least.
(After typing this all out though, I do see that this is conceptually simple but complex to implement.)