I think this might have been the agency I phoned a few years ago. Here was the conversation.
Me: 'I've been doing this quite some time and if you don't mind my saying so it appears that the photos are fake.'
Man: 'They are.'
Me: 'What's the point of that?'
Man: 'I don't have to answer to you.'
Then he hung up.
One can only assume he doesn't need repeat clients.