I did this with the CEO of Breather. Back then, you could target based off of employer, job description, school, and interests. You could also make these target options mutually exclusive—which, in the case of Breather CEO Julien Smith—meant an audience of 1.

My unlisted Medium post got 1 read. Felt like a damn king when it worked. Cost me (I shit you not) 20 cents to pull off.

Epilogue: I quoted him too high, and didn't get the job. Oh well. Still one of my best stunts ;)