How can I lose tokens just by signing something when no Gas was spent?
These types of signatures are not recorded on-chain, so signing them doesn't require Gas. But the party that obtains the signature can submit it on-chain to make the authorization take effect.
Many people think that signatures that cost no Gas can't affect their assets. Off-chain signature authorizations exploit exactly this misconception.
By the way: $ETH is reporting 2051.44 (24h -1.05%).
These types of signatures are not recorded on-chain, so signing them doesn't require Gas. But the party that obtains the signature can submit it on-chain to make the authorization take effect.
Many people think that signatures that cost no Gas can't affect their assets. Off-chain signature authorizations exploit exactly this misconception.
By the way: $ETH is reporting 2051.44 (24h -1.05%).