but what is difference between active and passive account? If someone invested into coin, and just store it in a private wallet, why it deserves less reward than any other?
Well, the article says that Waves want to reach more users with the airdrop extensions. They already received all "old" and long-term hodlers with the first part of the airdrop. Thus it is only consistent if for the second part of the airdrop you only consider users who actively do something. That can also be of course also old users, but at least the probability is higher that you reach users who have not participated yet. Only my assumption.