I think #1 model is a good approach.

You could also start doing #2 - more as a test, because if more podcasters start doing the same, it won't scale well with the current experience in SN (before we have subs).

Another suggestion I would have is that you create written original content on SN associated with the topic in your episode, you post it ahead of time and then maybe go through the comments in the episode if there are some good ones (for this it's good to post the content ~2 days before episode recording, encourage people to post SN comments on your twitter, etc...). This applies mostly if it's related to Bitcoin, Finance, Privacy and Freedom... (other topics are a bit frown upon at this point...)