Seems like you missed the bounties hype way back 2017. Back in the days, they airdrop some tokens where you need to share on your timeline when they post something on their social media page. The amount you will received depends on how much active you are from liking, commenting, and sharing their posts. Anyone can join it as long as they have their own social media account
But it's actually still the same the way airdrop and bounties are currently been run today, because it's still the higher the number of task done, the more coin you stand the chance of receiving, likewise the higher your amount of social media followers (Facebook, Twitter, YouTube, Reddit, & Telegram) the more coins you stand to get after the bounty ends and coin finally gets distributed