In a few words, if someone holds 7,000 ONIONS on that airdrop day (Fridays) then that person will get: 7,000*1.2 = 8,400 ONIONS that week?
if there is 250 people and 250k ONION to be distributed
if all 250 people were holding 1k onion each will get 1K $onion
if one people hold 250k then 1 person get 250k $onion
the difference we have more than 250k holding on the airdrop balances so with rough estimation
250 people will hold 2.5 m onion in that case
for every 1k onion you hold you will be airdropped 100 ONION