Hi all. While we do not have any updates to share regarding sign-up notifications, we've made sure to correct the status of this idea to more accurately reflect its current status with our engineering team and also made slight changes to the subject line in order for it to be more easily found. We can't guarantee a commitment to deliver on this feature request but it should indicate some awareness that we have heard your feedback and could be taken under consideration for a future release. If we hear any discussions to include other timing options, we'll share them here.
As previously mentioned, there is an automated Subscriber Activity Report that can be set to send daily to your inbox.