There should be different criteria that will affect airdrop.
The criterion of a transaction older than six months is bad. Maybe someone in crypto is shorter? Why would he be disadvantaged because of this.
Always people who come in later are worse.
The most important criteria are activity and volume.
If someone uses and is active all the time, it is not an airdrp hunter. The team should do it rationally.
Those who made one transaction six months earlier and nothing else should get a penny, because it proves that they are not an active user.
As I mentioned, the most important thing is activity and this should be the main criterion, then another.