The airdrops are free of charge, you just need to sign up to the feed in the green box that you'll get when you visit the site.
What are crypto airdrops, and is it a good way to acquire cryptocurrency? Is it worth your time? Free money through an airdrop and staking are similar. There are, however, several significant variances between the two. Furthermore, both entail little labor once set up. They also do not necessitate any financial investment at first. Time investment they do, though.