The Davidsonville Area Civic Association, uses Zeffy primarily for membership dues and business supporter advertisements; however we recently realized that we could add the option to make an additional donation and specify what that donation was for so our clients didn't have to go to another campaign in order to donate to our cause. In the 3 months that we have implemented this we have already seen an uptick in our donations, so I highly recommend that you add this to whatever your campaign is; selling tickets to an event, selling membership, etc.