The Alliance has no power to "do anything" other than bring people together and talk about it. Which I imagine is not what you are looking for :-)

In terms of real action - the main thing to do is to vote those BPs out. Another possibility is to file a dispute with ECAF. For that you would need some evidence of wrongdoing. I'm not sure what that would be, but if the regproducer calls for open API endpoints, and they are not doing that for some reason, then that sounds like a technical breach.