Even if the unreleased demos sucked, they're still a decent look into the album process. And who knows, maybe a song Madonna didn't like will be loved by people who aren't her. Remember, different strokes are for different folks, and if people can find, say, "Warning Signs" to be more interesting than "Shoo-Be-Do," then so be it.
Also colored vinyls are really gimmicky to me. The people who like it only care about the style of the packaging, not the substance of what the packaging holds.