Final filter for the publicized message URL?

A+ work with jetpack. Thank you all so much for your hard work.

Jetpack > Publicize on self-hosted, domain mapped blog:

I’m looking to send *just* the url to the social sites, my og/twittercard tags show more than enough to get clicks- all I want is links.

I almost accomplished this by always adding the _wpas_mess meta on every post with a single character “~”. so just that character followed by the url will show from website and iOS app. But’s it’s not a valid solution.

I tried and tried with publicize_save_meta action, and wpas_default_message/prefix/suffix filters, but to no avail. Tweaking $default_message,$default_prefix,$default_suffix didn’t do anything either.

Inline-comments referred to the “third step” being //...@see ::publicize_post() but digging and searching I can’t find the code that says *”hey social networks/wpcom, post this: $final_full_message_to_publicize”* so I can modify the what wpcom/networks are receiving (if its receiving and not pulling)

So my question would be

Is there a final filter for modifying the content (and url) before sent or pulled for publishing? i.e.: final_full_message_to_publicize or Is it wpcom that generates the “%title% %url%” post thats being published?, i.e.: it’s not filterable, all 3rd party (except the message using _wpas_mess meta)

http://wordpress.org/extend/plugins/jetpack/