> At best, registering an OAuth client is 5 minutes of clicking around a developer portal. But you never know.[…] DCR automates the client registration problem. Instead of requiring a human to manually get an OAuth client, your app dynamically provisions one, and then immediately starts the OAuth flow to this app it had never heard of before.

In the remoteStorage protocol, providers have been instructed to ignore client_id in lieu of identifying the connecting app by its origin.