It seems like this only solves one part of the problem, though. I'm seeing that this post above did not go through to twitter, because "User is over daily status update limit.", which is not the case for the crossposter.
I'm thinking they are enforcing tighter limits around automated tools, so this might be the issue.
I'll get in touch with their support, but given the they seem to be going through, I would not expect a swift response.
-- @renatolond