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by justsomeadvice0 1079 days ago
Trying to be fair here - it's technically not linked to any blockchains. It's just (ab)using the cryptographic primitives provided by the Metamask wallet app to sign things with a key stored in the wallet. That key might (probably) also be used to sign things that end up on any sort of blockchain, e.g. ETH.

The reason to do this is some people do indeed have Metamask (a browser extension, yuck) already installed and a wallet set up - so technically this might be an easy way to enable signing for them.

The reasons not to do this, I already detailed above. It is a neat hack, that would fare tragically when applied to the masses.