The Back In Stock Notifications add-on allows a store admin to export product notification subscriptions in a CSV file to get more detailed information on the timing and use this information for possible future references.
To export subscriptions for product notifications, do as follows:
Open the Export to CSV / spreadsheets page of your store Admin area (Catalog -> Export). Make sure you are viewing the New export tab:
Select either the Back-in-stock records option if you need to export the back in stock requests or the Price-drop records option if you need the price-drop request list or even both options at once if required:
Adjust export settings if required.
Click the Start export button at the bottom of the page.
It will take some time to prepare the requested files. When the export process is completed, the files will become available for download in the Last Export tab of the Export to CSV / Spreadsheets page: