When reading this finding, it made me think of a few participants from the New Editor Experiences research, who informed the "audience builder" persona. A few of those particpants had added information about themselves on their user pages. One in particular said he wanted a "profile" like there is on various social media platforms. This particular participant wanted a "profile" on Wikipedia because it is a world wide audience, and he wanted his "profile" to show up when people searched for his name online (he didn't understand that user pages aren't indexed). The few examples of this were people whose motivation to add content to Wikipedia were to build an audience for themselves, a product they were building, or a book they had authored. A few of the other audience builders were more focused on building an audience for a business (larger than just themselves), and so attempted to create article pages for that business. I am wondering if people create a user page right away, would it indicate they might be an audience builder? I am not sure about that, but wanted to share this thought, as it might help us to determine a user's motivation, thus which persona they might represent.
P.S I read the finding as them creating their user pages in their first day, but then talked with Marshall, and he corrected my understanding that the new editors were viewing the user page before it is created (the page that one lands on when clicking the redlink to then create a user page) , and did not actually create their user pages.