Back in the day, Google itself used spreadsheets as the backend of small pages (e.g. customer success stories). The reason I know that is because I found a few

Back in the day, Google itself used spreadsheets as the backend of small pages (e.g. customer success stories). The reason I know that is because I found a few spreadsheets that were writable by anyone, and ultimately led to cross-site-scripting vulnerabilities in google.com. I reported a bunch of those to their vulnerability rewards program.