If you look at the results tab of a smart program and click on "view campaign members", you are given the option to create a smart list subscription on the new browser tab. Seeing this as a handy thing (cuts out the step of creating a separate smart list of registrants), I tried it.
Everything appears to work as it should, but I have found that once you create it, the subscription is impossible to find on the pages where a subscriptions tab is offered (Activities, Database and Analytics). I even tried to set up the subscription again, and Marketo said that it already existed. But there appears to be no way to see, delete or edit it.
Is there a single view that show ALL subscriptions across our instance?
This is the only issue I've ever had with Smart Lists.