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On the one hand are memberships that convey benefits in exchange for a fee, and on the other, those that recognize donors for gifts made. To my way of thinking, this type of membership is actually an earned income opportunity and is better left to the museum's marketing department. They are one of the most useful tools fund-raisers have. Donors giving at a certain level to the annual fund become Friends of the organization. If they give at increasingly higher levels they have the opportunity to be recognized as Contributing Friend, Supporting Friend, or Sustaining Friend.