Pinecast will always let you set up a feed redirect to migrate to other services, no questions asked. Simply contact our customer support and we'll get back to you as soon as possible.
Unlike many other services, Pinecast will also keep your feed redirect active indefinitely. If you choose to leave Pinecast, you can downgrade to a Demo account (via the Upgrades page). Your feed redirect will remain active until you ever decide to delete your podcast entirely.