Thank you for taking the time to explain the thought process behind this decision. I think it's great that the hosts can decide whether or not to run an ad on their show but as CEO of Earwolf you're still ultimately responsible for the content (ads included) of every show.
Have you thought about possibly labeling each show that accepts tobacco or alcohol ads in the future? It might be a nice tool for parents of teenage comedy fans who don't want them targeted with ads meant for adults.