You need to generate a waves wallet with letters B, C and H in it, not necessarily in consecutive order. If the address contains the B, C and H letters in the consecutive order the address receives a double payout.
Then send your WCT to that address and wait until the airdrop has been completed!
This will be known after the airdrop. But if you look at the previous Waves airdrop: EncryptoTel - 1:100 1 EncryptoTel [WAVES] for every 100 WCT 1 EncryptoTel [WAVES] = 0,088 Do not expect a big profit.