Why did Wolf Creek 2 let people go?

In "Langxi 2", because Mike the Butcher promised to let him go as long as he could answer 5 out of 10 questions correctly.

The young man had two of his fingers cut off by Mike and was knocked unconscious by Mike. Mike let the young man go according to his own request. He tortured the young man for a long time, and the young man's spirit was already abnormal due to his torture.

No one would believe what a madman said, so he didn’t kill the young man. After the boy answered 4 questions correctly, Mike told the boy that if he answered the fifth question correctly, Mike would let the boy go.

Langxi resume:

Langxi County is affiliated to Xuancheng City, Anhui Province. It was called Jianping in ancient times and was established in the first year of Duangong in the Northern Song Dynasty (988). Located on the southeastern border of Anhui Province, at the junction of Anhui, Jiangsu and Zhejiang provinces, it is known as the "thorough of the three provinces" and has a superior location. As of 2019, Langxi County has jurisdiction over 7 towns, 2 townships and 1 provincial development zone. The county has a total population of 347,800 and an area of ??1,104.

8 square kilometers. Langxi County has a mild climate, fertile soil and abundant products. It is known as the "Land of Fish and Rice" and "Natural Botanical Garden". It is an important production area of ??grain, oil and silkworm cocoons in Anhui Province and a national commodity grain base county. Its main specialties include green tea, rice wine and golden silk. Candied dates, stuffed sauce, goose, whitebait, green shrimp, crab, turtle, etc., fluorite reserves are 2 million tons. Langxi County has tourist attractions such as Shifo Mountain and Longxu Lake.