Any idea why Mindgeek is removing the Milf Hunter scenes?
Scenes don't work for the most part or they have stopped working. Unlike other porn production companies, Mindgeek does not remaster or upgrade the scenes, so they have their webmaster remove the scene. It's easier just to take the scene down. Photo galleries get taken down for other reasons. If the accompanying photo gallery has been removed from the scene, then Mindgeek does not have to continue to pay the photographer royalty payments.
As for companies that do upgrades and remaster scenes; those would be: The Score Group, Bang Bros., Naughty America, Evil Angel, Adulttime, Videosz.com and Bang.com, Elegant Angel, and Nubiles, etc.