White smoke comes out of the chimney before the election of the new Pope in Vatican City. Monad has probably indicated the arrival of a new chain with purple smoke. Which is definitely Monad chain. 
The first tweet is pointing to 76%, indicating that the Monad mainnet is at 76%. And the second tweet strongly hints at the arrival of the mainnet.

Now let's calculate when the mainnet can come? Very recently they opened the form for validator recruitment. And the selected validators will participate in Testnet 2 from the end of May. Which will last for a minimum of 10 weeks.

That means until July. If all goes well, we can expect the mainnet and airdrop to be in mid-August to early September.