2020-04-10 UTC
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@bradfitz @skarra @apenwarr @evntdrvn @davidcrawshaw @rstropek @schlagfell @Tailscale Yes, it used URLs instead of email addresses. It was ahead of its time. (Nowadays non-nerds people are more likely to identity with or share their Facebook or Instagram or Twitter or GitHub handle than an email) Relying Parties balked at not having an email address to spam with. (twitter.com/_/status/1248489373055631361)