Inactive Championship Riven codes
So I went to a LCS game today and in the shop they had a promotion going. The promotion was that the first 35(ish) people to spend 75$ got a free statue of Ryze and Tryndamere (The limited edition one from season 3 that they only made 10,000 of). I was really interested in the statue so I bought 75$ and got it. When I looked at the box it was in there was a code for Championship Riven included. I have played a lot of riven over the last few months and desperately wanted this skin, but accepted I would probably never get it without buying an account with the skin, which I never planned on doing, so when I saw this skin code I literally freaked out and jumped up super excited because I thought I was getting the skin as part of the deal. Then I went home and tried the code to find that it was inactive. My question now is why would Riot give away a code for a skin that doesn't work? I was super excited to finally have this skin and when it didn't work it really sucked. Is there some sort of purpose of them giving this out? They have to have realized people would be getting their hopes up thinking the code would work, so why would they do it if it wasn't supposed to work? Am I just missing something really obvious?