Just like what happened in Arbitrum before, like there are already lot platforms especially DeFi platforms in Arbitrum before the airdrop and you just casually using the chain without knowing or expecting any airdrop.
If you accidentally used the Arbitrum blockchain, then I am sure that your airdrop was small compared to those who made efforts to increase the volume and number of transactions. And it is natural that their efforts were generously rewarded, although those who accidentally used the blockchain were also satisfied, as they received free coins that they did not even count on.