Correlating the coinciding timing of player join and disconnect notices and the loading and unloading of locations let Nerds Inc. tell where specific players stood, not just that a player was there.[16] The exploit became more effective with an adaptive tracking system programmed by a member of Nerds Inc.,[15] predicting the paths individual players would take using Monte Carlo localization in response to the server implementing rate-limits preventing less efficient search methods.[17] The data gathered amassed about 2 terabytes during the 3 years of tracking terrain, paths, and base locations.[16]