"If I don't hear from you, this will be the last email."
Loss aversion! As you can see from their response, they really are interested, but due to internal challenges, they have not gotten approval.
https://www.bizjournals.com/philadelphia/blog/guest-comment/2016/08/email-magic-how-never-to-be-ignored-again.html
I like the idea of a "No-oriented question". Especially if it effectively "breaks open communication log-jams"as Chris Voss states, very subtle technique, never heard of this before but will definitely be putting it to the test!
and yet, I still hit delete.
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