I believe there should be a bonus crate key, that can only be obtained through a regular crate key. Just like the platinum slots there is a bonus crate key for that and I believe it very good because of the amount you can win. An bonus crate key may only contain very rare - exceeding rare as the bonus crate key may be so rare to get. A rare crate key can act in the same way, but I believe it'll be cool to have a bonus crate key that contains new items, an example of some of the items can be found on Zhihu post.
