Thank you so much for the work and the explanations. Finally something with real numbers and reliable statistics.
I would like to ask about of one the points you made: You noticed quite long stretches of lower or higher drop rate. When having a probability like 1/3 or 1/5, such deviations should be extremely rare. Yet, they happen and often enough, but in the long run they correct themselves to the expected drop rate.
If you have a 6 side dice (similar to a purple drop rate), less 100 throws should be enough to determine whether is loaded or not with a confidence level of more than 95%.
I would like to ask to a statician or a programmer whether is possible that whether the probability for a particular fluctuates within a period of time, and in the very long run the integrated probability is the expected.