These pins are given to Foundation "Sustaining" members. That is a personal contribution by the individual Rotarian to the Rotary Foundation of $500 or more dollars.
 
The Rotary Foundation is a fund that provides assistance world wide including domestic projects in accordance woth Rotary's goal of reducing hunger, alleviating poverty, improving education and promoting world peace. Rotary has, since the funds inception, given over one billion U.S. Dollars to such projects.