[Ayesh]

LetsEncrypt doesn't see your private key when you obtain the certificate. So no, it's not _really_ a juicy target.

[account42]

On the other hand, who's gong to notice a LE issued cert that they did not request in the certificate transparency logs?

[cpach]

The ones who monitor their domains in the CT log.

(Mom-and-pop-stores probably won’t. Other orgs might.)