I wonder if there is any history of VizAlerts sent, not just data about the subscriptions. Is it possible to track how many emails were sent for a specific view in a specific workbook on a specific day? I think it'd be great if we can do some analysis on the number of VizAlerts sent.
I definitely agree, it'd be very useful for a lot of reasons. Unfortunately right now that'd be a bit tricky, because the only place that information is kept is in the log files generated by VizAlerts, and the output is not very cleanly structured. A service like Splunk would be helpful for this kind of thing. We have an item on the backlog for this, but it's still quite a way out.