IMO they should set a time-frame like 24 hours and tell not important how many packs are sold in what time every pack who will be sold in the 24 hours after the price-change will qualify for the next airdrop (or two).
Unfornately @yabapmatt seems not to be interested to interact with the user who write comments to his proposal, in every case I cannot see any answer, but probably for him only the whales who decide the proposal are interested.