Have you considered developing a similar secure solution for protecting and selling Excel files,
Google Sheets is a great tool for organization and data processing, but it is not powerful enough for advanced engineering calculations, where VBA in Excel provides unmatched automation and computational ability. The true value and revenue opportunity lies in securing and selling Excel spreadsheets, as engineers overwhelmingly rely on Excel and VBA for their daily critical tasks. Offering protection and monetization for advanced Excel workbooks would meet a real need in the engineering community and present a strong business opportunity beyond Google Sheets.I strongly encourage you to explore building a platform or features focused on Excel spreadsheet protection and sales to address this significant gap in the market.