When you swim with sharks...
...expect to get bit (or laser beamed). Apple and MS both have done this kind of thing. When it comes to making profits, giant corporations generally have all the scruples of Hitler and are restrained -- sometimes -- only by fear of legal consequences.
But even then, in some cases they decide "damn the torpedoes" and go ahead with something like this, putting their "partners" on terms much like France's position with Germany in WW II. It is true that sometimes the giants lose and have to pay out (Stac Electronics case with MS, for example), but often they get away with their crimes due to their vast legal resources in comparison to some small fry startup. After all, in civil court, Murphy's Golden Rule ("He who has the gold makes the rules.") tends to apply.
