Another patent of the same name filed by Nexon Korea in November 2017 includes controlling the probability based on the ratio of free goods and paid goods when users execute the Gacha event. This method increases the probability of a particular item when there are more paid goods than free goods. In March 2018, a patent was also filed to increase the probability of a particular item appearing the longer the retention period depending on the period of Gacha ticket retention.
Jangson, who said there was no probability manipulation, even patented it.