I sell Better Sheets on AppSumo and I can give you 100,000 dollars of reasons now. But in reality the real reason it rocks to sell on AppSumo are the customers! The people who make Better Sheets better. By asking questions, by reviewing the platform, by being there for others in the forums and groups.
Better Sheets Website: https://bettersheets.co
Better Sheets on AppSumo: https://appsumo.com/products/better-sheets/
Sheet Styles (Free Google Sheet Add-on): https://workspace.google.com/marketplace/app/sheet_styles/972515187169
8 Excel Alternatives: https://blog.appsumo.com/excel-alternatives/#1_Google_Sheets