This ticket is a placeholder to discuss the work involved and prioritizing of creating pipelines that would listen for SSAC events where returnTo is filled and fire off new events that would populate a table logging pages and their count of new registrations.
Through the Server Side Account Creation table's returnTo field we can see the wiki page the user was on when initiating Create account.
However, while SSAC is on the allow list, returnTo is not which means this data is sanitized and purged within 90 days.
Having returnTo data beyond 90 days in a safe non PII format would be useful for campaigns product and other teams. It could also benefit Key Product Metrics reporting's readers, content, and editor's analysis.