By joining the EEA you are not committing to use the public Ethereum blockchain. In most cases, I think companies are likely to use the Ethereum codebase and r

By joining the EEA you are not committing to use the public Ethereum blockchain. In most cases, I think companies are likely to use the Ethereum codebase and run their own private chain using their own servers. That mostly defeats the purpose of a blockchain, but it arguably still provides more security than using a single, centralized database somewhere.