Could you please elaborate on the qualifications required to be eligible for an AirDrop in Parcl? Are there any specific conditions or criteria that need to be met, such as holding a certain amount of tokens or having an active account for a minimum period of time? Additionally, is there a limit to the number of users who can participate in each AirDrop, and if so, how is that determined? I'm particularly interested in understanding the process and the requirements to ensure that I can take advantage of this opportunity when it arises.