If you used to send it every episode, it's likely a chunk of those subscribers are relying on those emails to tell them your episodes are up. I'd honestly worry

If you used to send it every episode, it's likely a chunk of those subscribers are relying on those emails to tell them your episodes are up. I'd honestly worry about losing eyeballs because people missed episodes they weren't notified of. EDIT: Also note that the subscribers you are losing for sending too many emails probably weren't watching anyways, which is why they unsubscribed. Value your real connections and don't worry about losing people who have already lost interest.