I can think of three reasons why one will publish the names of MPA who pro ide BBFS.
1. To brag about trophy.
It might be a case if BBFS was offered as a sign of recognition, exceptional trust or favor. Rare scenario but might happen between hobbist and long term favorites.
However, sharing her name in this case will be a trust violation and will doubtfully happen. Most likely, that hobbist will keep this secret as a dwarfs wheir gold. I would do anyways.
2. Fair trade ($).
In this case MPA might care less about "publicity" and the list will be beneficial to all parties. Just make sure the girl gave her consent. Otherwise, this offer will fade away along with girl very quick.
3. Just bulshitting, trying to revenge the all MPAs in a world blaming them on his ED.
This scenario was discussed enough on this thread.
Anyways, let's be modest and enjoy the service these girls provide as long as it's mutually beneficial and doesn't complicate the life.