Certik Airdrop: guide how to participate and claim
Certik is a security auditing company that also has its own platform for analyzing crypto projects. It allows you to complete quizzes and other social tasks with the expectation of a potential airdrop.
Certik Skynet
Skynet by Certik is a platform for analyzing projects and participating in social quests. To register, go to skynet.certik.com/quest/signup, click the Log in button and create an account using your email. Next, go to the Quest tab and start completing simple tasks.

The questions are mostly related to the security of a particular service. At the top of the page, you can go to the daily tasks, sometimes they change, but usually they are related to simple actions, for example, viewing statistics of two projects.
Other ongoing airdrops
GOAT Network
GOAT Network is a Layer-2 solution built on the Bitcoin blockchain. Here's how to take part in the project's potential airdrop.
Usdx.money
Usdx is a synthetic stablecoin backed by other crypto assets. The protocol offers staking yield and a flexible point system.
Treehouse
Treehouse is a defi service that offers yield on ETH coin across different networks such as Mantle, Ethereum Mainnet and Arbitrum.