Track theft is a very big deal for some people, and significantly more likely to be a bigger deal for subscribers. People like Gainn have stopped posting most tracks to the Udio site completely due to the way things currently are.
The suggestion is allow everything as is as default, but then allow certain things to be turned off on both a track to track basis or through the global preferences as default. Things like disabling music downloads, video downloads, extensions off your track, remixing of your track, inpainting of your track (which I know can't be done, but you could allow this option if we had the ability to turn it off?).
I know this is a huge thing for a lot of people and would be very welcome. I feel like it would make for a great "Subscriber Only" feature. Because creativity and use of samples and things on Udio should, by default, be allowed but then paying members want the ability to stop track theft.