Alright, so this tactic I learned from my good friend Mr. Morgan J. Ingram. Go follow him if you're not already. This is a winner! When you have a great call with someone, before you hang up, say this with a little chuckle:
"No matter what happens, let's agree not to ghost each other, okay?"
They chuckle, you hang up. The deal moves on.
When/if they ghost you, send an email and the subject line is the ghost emoji "👻" (nothing else)
The body of the email is:
"Are you ghosting me?"
The reply rates are bananas. try it out. Works a lot!