Comment by Ukv

> it doesn’t give you the right to send it with “signed, ricardobeat” at the end.

Given this was "a developer using upstream code verbatim", in your analogy "ricardobeat" would've been printed on the blank postcard by you, then you gave me the postcard with permission to use/modify/redistribute it. Plus it'd be a machine-readable field interpreted as "this postcard supports the same envelopes as ricardobeat's template", not something read by a third-party.