Shared Sequencer advantages:
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Sequencers as a service
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Pooled Security & Decentralization
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Cross-chain Atomicity
That helps you check the ABR airdrop:
1/ dune.com/0xroll/arbitrum-airdrop
2/ dune.com/pandajackson42/arbitrum-arb-airdrop
3/ dune.com/cryptuschrist/arbitrum-airdrop-public-query-version