Revoking API Keys for PUBLIC api.creator.zoho.com Apps?

Revoking API Keys for PUBLIC api.creator.zoho.com Apps?

In a previous thread it was made clear there is a distinction between how Private API access is handled. Simply share the app with one of your users and if they abuse their access it's simple enough to revoke access.

Is there any such control if the app is made "public"?

Are there any other ways to protect the access to the data? Perhaps as a Google App or something else?

I'm trying to avoid paying Mashery a princely sum to manage access, keys, throttling, etc. I'm after a less API management solution (and hopefully that's built into Zoho somewhere).

Gerald