So if I’m understanding correctly, I think they mean “going on too long” in context of taking too long to get the content. If a show is over and there’s no new content they’re waiting for, you can do whatever you want. I still release bits of social media marketing and supplemental content for my web series that hasn’t filmed an episode in 2 years, because I love it, but I’ve also transitioned those viewers to new projects because I know I can’t make more of the first show. We’re doing web series, so inherently we have far more opportunities for finding viewers than traditional TV because it’s not confined to a single air time- people can discover it whenever. Your plan has more to do with what you feel like doing and how much marketing energy you want to put behind a show that’s not making new episodes. You don’t abandon your audience, you just move them to the next thing, or to a more broad “Steve” thing, so that when you do have a new thing they’re already ready. Start a newsletter that’s more broadly about your work as a whole or yourself as an artist, start a blog, etc.