Guillaume Moubeche, CEO of lempire (a B2B software business), has a podcast called Bootstrapped Stories. He interviews big-name thought leaders and asks them to share sound-byte links on their socials, which most folks are eager to do.
Then, he keeps tabs on the users that interact with those posts (or gets a list from his guests) and emails the leads directly to recap the podcast and offer a 15-minute sales call.
The relevance and familiarity of a mutual connection provides the kind of social proof that builds trust and captures attention. Plus, the CTA is reasonable.
Check out CXL to see the emails Guillaume has gotten in response to this tactic.