The relevant info is posted in the 1st post of the thread, but:
Airdrop Amount =
(Total coins to be distributed) * factor / sum(factor * number_of_member_type)

The factor is based on the member type, and is in the following table:

MembershipType   Factor
Junior Member          0.8
Member                    0.9
Full member            1.0
Sr. member              1.1
Hero member          1.2
Legendary member      1.3

Just snipped that out to answer the question