Yes, multiple people can contribute to a single Memory Maker purchase at Walt Disney World, provided they are all linked via the "My Family & Friends" list in the My Disney Experience app. While only one person "owns" the Memory Maker entitlement and has the right to download the photos, any photo taken by a linked friend or family member (up to 25 people) will automatically appear in the owner’s gallery. This is especially useful for large groups or families who may split up during the day. As long as everyone has their "Photo Sharing" permissions turned on for the Memory Maker owner, all their ride photos and Character meet-and-greet shots will be captured and available for the owner to download and share with the entire group.