It's not the first time Kirk has criticized CNN. Last month, he accused the network, along with other media outlets for "trying to bankrupt" InfoWars host Alex Jones.
Olbermann called Kirk a "balloon head" and "the evil Charlie Brown" before staying the Salem Media Group radio host was "not the best and not so brightest young conservative troll".
According to Brandastic, podcast listeners consume an average of seven shows per week, and around 24% of the U.S. population (68 million) listen to multiple podcasts weekly.
Borrell Associates projects that figure will climb considerably over the next four years as the industry undergoes what it describes as a "great reshuffling."