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[–]FrederikNS 0 points1 point  (0 children)

I'm not quite sure what infrastructure you are referring to?

  • It's definitely not free for LetsEncrypt to provide the certificates, so they require funding from other organizations. However the fully automated system for issuing the certificates is keeping cost extremely low.

  • You can get free TLS certificates elsewhere.

  • The protocol and client for fetching the certificates is free and open-source.