I have a workspace shared with 10 collaborators (all of them with the same permissions as Creators), in it they have created 15 bases. Is it possible to know which collaborator worked on a specific base?
I believe the only way to see activity is at the record level, in the comments/revision history. You can see when collaborators were added to a base, however, that doesn’t really help for what you are asking. In the past, when I’ve wanted to know who has worked on what, I’ve set up a view that showed date and collaborator of last edits. That way, I could see what records were revised and who did it.