Originally Posted by Your Persona
Actually they did. When they announced that purchasing the Collector's Edition would get you a skin exclusive to the bundle.
Your trying to play the legality game, which doesn't work considering the fact that, as seen with the Constitution, words can have double meaning.
Why do you think we have the supreme court?
Anyways, since you instigated the legality game, here's the double meaning.
According to Mirriam Webster...The definition of Exclusive.
b : limiting or limited to possession, control, or use by a single individual or group
The legality here is that the wording (In the definition nor product description.) doesn't say that it must and will always be exclusive to that bundle. The description was merely advertising that it, by happenstance, is exclusive at that time. The only real obligation here that Riot has, should they offer it to the public, would be to edit the bundle description so that it wouldn't be false advertising.