After thanking the Inoreader team for implementing inbound dynamic OPML, I thought to ask if they had also implemented outbound?

Yes in fact they have. "Yes, it works the other way too! You can right-click a folder → Folder properties → enable Output feeds, choose OPML, and you’ll get a URL you can use for syncing elsewhere."

To which I replied: "We're going to be best friends. ;-)"

This is how a ball starts rolling. You can sit there forever just wishing someone would play the game with you. And then one day, quite unexpectedly — it turns out that someone has been doing the same as I have. And now our products are connected.

Here's the list of feeds I'm subscribed to in Inoreader. And it should update when I subscribe or unsubscribe to feeds.

Bing!

Bing!

Bing!