Hold a minimum of 25 ALGO in your ALGO wallet. Download wallet for Android or IOS
Register your wallet by submitting a microtransaction of 0.000001 ALGO to address: “ZGP25YTZL3NF43SQZREMH5BRBTJEXHWPL6TSQDCGJWPEN4XJTIHVOZSOLA” no later than block number 1618450, which is expected to happen between August 31 and September 1, 2019
The snapshot of the wallet balance will be taken when the deadline block is reached
The minimum balance must be maintained from the start until the end of the airdrop period
The rewards will be distributed over the course of four 6-month periods for a total of two years
The reward is calculated by the number of AlGO for that period (50,000,000) divided by the total number of ALGO across all qualifying wallets.
For more information regarding the airdrop see this post