Lifetime RPに応じた報酬についてについての現時点でのRiot Gamesの見解です。
RiotHippalus: Riot promised rewards for active RP buyers as from Season3, can we still hope for it?
Riot Hippalus氏はSeason 3末に予定されていた、RPを購入した額に対する報酬(報酬と書きましたが実際には感謝の意ためのものです)について、元々予定していたサモナーアイコンへのユーザーから報酬として十分ではなく、良い印象を持たないとの反応があったそうです。
また、他の調査ではRPを購入していないプレイヤーの過半数が否定的で、Rioterがスキンを100個もっているかそうでないかでユーザーを判断することに悪い印象を持ったという調査報告を発表しています。
Riot Hippalus氏はこの種のプログラムを実装する理由に「プレイヤーへの感謝の意を示すことだけだ」を挙げており、悪い感情が生まれてしまうことによって実装への意欲は急速に失われたと話しています。
現在、Riot内部における議論はRPの大量購入者ではなく、プレイヤー全体に対して何ができるかに焦点が向けられており、そのことがRPを使うことなく購入できる、Weekend Double IPの再開やSummoner IconのIPでの販売に繋がっていると説明しています。
今後も他のアイデアの評価を継続する予定で、それらはRP購入者/非購入者を区別しないものになると話しています。
This has not been forgotten and is still discussed internally. Here's the tl;dr of the history.
The original plan, back when high quality summoner icons were rare, was to give out Riot Supporter icons that evolved in coolness based on how much lifetime RP was spend on an account. It was intended as a simple thank you to players who could then choose whether or not they wanted to display it to show they had supported the game and made it possible for so many to play for free.
We ran some surveys to make sure it would be well received, and the feedback from RP spenders was that it wasn't enough of a reward and didn't feel good. So we went back to the drawing board and came up with plans for scaling rewards that we also tested by survey. While those scored better with RP spenders, they were negatively received by the majority of the player base that hadn't spent money. They also felt bad to some Rioters who take pride in treating all of our players the same whether they have bought zero skins or 100.
The only reason to launch this kind of program is to show appreciation to players and create good feelings all around, and so the interest in moving forward dies quickly when we realize that just as many bad feelings will be created. So more recently our discussions have focused on what we can do to benefit all players and not just spenders. This has resulted in the return of double IP weekends and an increase in summoner icons that can be earned without spending. We continue to evaluate other ideas (like cars and wives/husbands for all!), but if they happen, they likely will not distinguish between RP buyers and non-buyers.