They don't do anything of the kind right now but the terms and conditions permit you to change that at any moment you wish to.
If you don't want to do this and will not do this then make it plain in your terms and conditions.
If you don't want to do this and will not do this then make it plain in your terms and conditions.
The nice thing about delivering software directly to the client as we do is you can examine the exact code which gets sent, and confirm that it is what you expect.