Master Contract Token (MCT)
Tokens were distributed to any Neo address that received a transfer of any existing NEP-5 token on the Neo MainNet before May 8, 2018 00:00:00 UTC (ending with MainNet block 2240482). 567,442,000 tokens were airdropped to 404,453 Neo addresses.
1,000 tokens were distributed for each third-party token held for some length of time, regardless of the amount.
For example, if a Neo address held only RPX, RHT and ONT (in any quantity) at any point before May 8, 2018, they would have received an airdrop of 3,000 MCT.
This airdrop distribution is designed to put MCT into the hands of the most active users participating in the NEP-5 token ecosystem rather than just the richest holders.