One thing I fail to understand is a podcast feed that does not have enclosures. What am I supposed to do with that? 

What I find is that if I hunt enough I usually will find the feed that has the enclosures, but there's no predictable way to find it, and sometimes I don't, which results in un-listened-to and un-linked-to podcasts.

If you want your podcast to be heard, make it easy to find! 

Update: The feed I was looking for was the FiveThirtyEight election podcast feed. I eventually found it in an out of the way place, the ESPN podcasts index page. Apparently they're sharing a CMS. There ought to be something on the FiveThirtyEight site, that's Google-able, that gets you to the ESPN site. For now, this post may leave enough of a marker for other people to find it. Hopefully now their updates will show up on the podcatch.com home page.