You know Google company how much paid to student for returning Google domain. We cannot imagine the huge amount which is paid to Student for returning Google Domain. If you are imagine that Google paid just in millions, it is just imagining but actually Google Company paid to students 6006.13$ which is very big amount. Student just invest 12$ and this student paid for returning domain from Google.
Student decided that Google this amount paid to Indian NGO Arts of Leong India Foundation. When Google Company look student spirit Google Company decided that they will paid double amount of 6006.13$ and they paid to Indian NGO Arts of Leong India Foundation 12012.26$ which is very huge amount.
Google Company said that it was system mistake because no one can buy Google Domain.