The airdrop will launch (depening on the amount of signature campaign participants) a few days after the project goes live.
As long as you will have the signature active on bitcointalk, you will receive some coins depending on forum rank and signature used. For example: 321,428,571 PUPPY per day airdropped, 100 active signature participants to equal parts: 321,428,571 : 100 --> Everyone receives 3,214,285,71 PUPPY per day.