One can't always correctly assume the motivations for a contribution, but 'bragging rights', as you put it, rank pretty highly in my experience. To lead a susta

One can't always correctly assume the motivations for a contribution, but 'bragging rights', as you put it, rank pretty highly in my experience. To lead a sustainable project, one has to be sensitive to these motivations and make satisfying them a sufficiently high priority. That doesn't have to mean a three-page press release every time someone joins your project, but it probably means publicly thanking a contributor for their first contribution. Every project is different, but as for myself I believe I have been successful in balancing my responsibilities as a maintainer appropriately whilst giving credit liberally. If this has helped someone fill their resume and land a dream job, even the better for it!