Think of this: You have a cool object that you want to give someone.
You can set it as no-copy and the person wouldnt be able to replicate it, neither for their personal use or for distribution.
You can set it as no-modify and the owner could neither modify it for their personal use nor could someone else modify it if they were given the object or a copy.
But what if I want to give an object to someone, let them modify it and make multiple copies for their own use, but not for resale or even redistribution?
I suggest a no-sell and a no-give flag. Any other ideas?