So someone please explain to me why I can't get a crate with a champ I don't own.

I love playing the free rotation, as I love playing a wide variety of champions. I am the biggest whore when it comes to champions. One week I main Poppy, the next I'm Malphite. It's not so flavor of the month, more just that there isn't really a wide variety of champs I enjoy playing. Save maybe jungle, where I can solely play Rammus because I'm bad at jungle (as an aside, any good tank junglers y'all can recommend? I think my champ pool for a role should be larger than 1).

So, I play free rotation alot. I own almost 1/3 of the cast, but I still am not satisfied. So I spam normals, my lp drops, I'm playing a new champ, my rank stays stuck at bronze III...

But, there have been multiple times now where I've played a free champ rotation dude, went above 10 kills with few deaths, got S rank OR a friend gets an S rank, and I receive no reward.

Which, I don't really understand why that is. Like, I played well, can I get my rewards? No? What, you don't like my 233/0/2 Rengar play? okay... Actually I'm shit at Rengar. Please don't look up my match history.