Try to browse on Twitter community and you'll find there some good threads to read regarding airdrops. I've been doing a lot of it lately but I'm just into the free ones that wouldn't put any money on it. There's another thing with airdrops and they are likely good and that's running a node to be qualified but I'm not into that considering it's too technical for me yet but they are worth it.
More on Twitter to see potential Airdrops but that's no guarantee whether you will enter as a reward in the team criteria because it's still very absurd to see it, every airdrop has different tasks but for now the most common is to interact in Their network is especially expensive but it's not enough just to interact once but it has to become a routine at least once a month and this is what I know on Twitter, including being included in the Arbitrum airdrop.
Running a reward node will be worth it but it does require some costs to be spent on buying a regular VPS, but there are no guarantees the same as said above, the main thing is you have to be prepared to spend money on airdrop fees now.