Not it does. But I just wanted to point out this. You have spent (let's just say) 600 RP on the boxes. It is no longer free for you. I just want to point out that getting something "free" from this crafting system is not easy. I'm not saying it should be. No problem with Riot using Hextech for cash.
You have spent $5 on a $15 dollar skin. That's kosher. Not knocking you for it. But you've also spent about $5 in keys. So you got Infernal Susan for 2/3rd the price. If you see a skin you really like, don't chase the dragon. It's much better to just buy the skin most all the time.
Riot messed up in the fact they are making Keys hard to find. They should make it so you get MORE Key's than you can use. People can only get 52 chests a year as free to play (F2P). But if they were sitting on 60+ full Keys they would most likely buy the boxes to use the keys on. In the short term, buying Keys makes good amount of money. But as people start getting less and less boxes (how many people really play 52 champs a year at a decent level even counting the friends who get you an S by their play) you will see less and less Keys bought.