Thats a great question. As of the time of this post Polkadot parachains have not launched yet, and neither has PolkaSyndicate's reward system. PolkaSyndicate's presale is set to launch soon. After the first presale there will be marketing campaign and development of the PolkaSyndicate platform. The goal is to get PSYN tokens to presale holders and allow them to stake them as soon as possible. Preferably before Polkadot parachains begin.
You can follow PolkaSyndicate Telegram for updates on Polkadot parachains and PolkaSyndicate launch dates.
Thank you that you explain all detail about parachains and airdrops on parachains. I think that idea is very profitable for users. What do you plan to do first of all to realize this idea?