Not op, but op may be using the Youtube Subscription RSS feed. Go to https://www.youtube.com/subscription_manager and scroll to the bottom. You should see a section labeled "Export to RSS readers".
I currently receive email notifications for subscriptions, but I've noticed I don't always get emails for all the uploads of some of those channels. A direct RSS feed should solve that problem too.
They're all still on YouTube, but I just subscribe to the YouTube rss feed. Also since they don't get ad revenue, I pay ~$15/month to assorted creators.