There are two types of airdrops: "Gift Airdrops," in which you receive items without consuming tickets, and "Ticket Airdrops," in which you receive items by consuming tickets. 

・Gift airdrops
Airdrops allow you to receive items without consuming tickets.
※The number of times an item can be received cannot be increased by using tickets.

・Ticket airdrops
An airdrop in which an item can be received by consuming a ticket.