Those aren't podcasts, in my opinion.
When things I subscribe to become not-podcasts (which has only really happened once - looking at you BBC), I spend a few minutes looking for something new to try out instead. I always have too much in my queue anyway.
My understanding (and I might be wrong here) is that the BBC not-podcasts are for folks within the UK, since the globally available ones have ads, right? I'm not in the UK, and am subscribed to several BBC podcasts, none of which have been not-podcasts.
Not sure to be honest. A couple of years ago someone at the BBC decided they wanted to push listeners to their app (which has live "radio" as well as shows on catch-up). They chose a few of their most popular podcasts, including The News Quiz, and made the appropriately surreal announcement that (great news!) this _topical_ comedy panel show would now be available six weeks sooner via their app.
The RSS feed still doesn't have ads last time I checked (at least for me, accessing from the UK), but now aggregates six-week-old political satire. I do have BBC sounds on my phone, but I never remember to listen to it. I always just go to my podcatcher out of habit, and end up listening to something else.
You get ads outside the UK, which is always weird for me when i get back from holiday and have a bunch of shows i downloaded while I was in another country and haven't listened to yet. Actually, I say bunch - but I've deleted everything except In Our Time. Australian Broadcast Company does more better podcasts than BBC these days.
The distribution pipeline is invisible because of the open, distributed ecosystem.
As soon as a podcast announces it is going platform-exclusive, the pipeline becomes extremely visible for everyone except those already subscribing via that platform.
