According to the Babsang Community Welfare Foundation, Yoo Jae Suk had started to donate coal briquettes since 2013's 'Infinity Challenge' special where he donated proceeds from an auction to donate. He donated an extra 80,000 briquettes last month.
The foundation revealed that it was not just a one-time thing, but a continuous support that he's been participating in for 4 years. The foundation said, "We hope through Yoo Jae Suk's good deeds, society becomes aware and considerate of those in need and those that have been left out. We thank Yoo Jae Suk for supporting us each year."