The CSV download available on each page includes the earnings data displayed in the current search results. Since all pages in Quiver Finances default to the current month and there usually isn't any earnings data in the current month, there is no data to include in the downloaded CSV.
To include earnings information in the downloadable CSV, users must first update the data range on each page's filter settings. If the date range selected includes earnings data, then that earnings data will be available in the downloadable CSV.