After discovering that you can’t edit the “subscription confirmed” email at all, ie. the second email sent after the user agrees to follow, I’ve decided to abandon jetpack subscriptions.
Quite disappointing, and not a good use of time trying to find a solution.
Hmm actually I guess it may not be possible since a user browsing the site isn’t connected with any particular subscription when they return at a later date anyway.
I might look at sending out another email when the user confirms their subscription.
