I'm a Slate Plus member, mainly for the extra segment on the Slate Political Gabfest. Ironically, none of the three hosts of that show have worked at Slate in years, which is probably a large part of what makes it enjoyable.
For reasons I'd be hard-pressed to explain, I listen to a number of other Slate podcasts, even though I often find them irritating. Most (but not all) Slate writers and hosts come across less like thoughtful journalists or experts in their field, and more like college bloggers writing an angry screed about how everything in the world is terrible.
There are a few exceptions, but not many. And I do enjoy hearing from the actual experts they have on the various podcasts.
Kind of looking forward to watching this group of clowns destroy their own jobs.