Questions about 10th anniversary gifts

Dear Riot, First off, I do not want to sound ungrateful, because League is a game that I very much love and enjoy playing, and I am very excited for the recent ten-year anniversary announcement. Although nothing can change my love of League in the near future, I would like to know why Riot Kayle was the skin that was chosen to be given away. I know it is a skin that not very many users had owned in the past, and that there has been a theme of re-releasing skins, but I strongly feel that it is unfair for the players that had the skin before the re-release, as there’s no way for us to “prove” we had it for a longer time. For example, people who owned Championship Riven before its re-release received a loading border unique to the skin, and I was wondering why the same wasn’t happening to skins such as Riot Kayle. While on the same topic, I feel that it is especially unfair for the people who attended PAX and got the code there because as it says on the Riot website, “Riot skins are based around the ‘Riot’ theme and are obtained by either meeting a Rioter or attending an official Riot event”, (https://support.riotgames.com/hc/en-us/articles/201752944-Guide-to-Legacy-and-Limited-Skins#h2q3). I feel that it is unfair that the skins were marketed as limited and are now being released to many people on a wide-scale when the Riot support site says otherwise, and because I have still not gotten my mystery skin in the duration of time it took to send in this ticket I would like to know if it would be possible for me to receive a skin that will stay exclusive or not be released again, or the Riot Fist Bump Ward Skin.

Thank you, Fuzzybeary