I TOO have made a graph, hopefully to confuse you.
I have graphed the long term effects of random keys on the post-postular effect of a player-run economy in a controlled environment i.e. the coorelation of Lunia economics to the Llama population and the results I have found are startling.
At the beginning of every fiscal year the margin profit reaches equilibrium with the llamas and the second line (indicated by the color green) shows the gradual increase of Random Box Key prices in a post-release post-9/11 Asuka economy.