You vote by giving money which goes to the charity I designate. I chose the MIT Community Service Fund which is used by MIT students and others to do social work locally, e.g. in Cambridge schools. I ask for your vote so we can help the MIT Community Service Fund. It helps MIT students do good work. I am retiring this year and never have won the Big Screw Contest.
Any contribution helps.
The contest is run by the APO which is the MIT service fraternity, a student organization. Below is part of their official blurb. In addition to raising money for charity, the purpose of this contest is to recognize prominent MIT faculty and staff members, and to promote MIT community spirit. Officiating Body A committee formed before the start of the Contest will be the officiating body of the Contest. The committee will consist of the Contest Chairman, the Chapter President, the Chapter Service Vice President, and other individuals selected by these three persons.