How likely would you be to block a company from asking you to rate everything they do?

A critique of NPS (Net Promoter Score) surveys as a form of corporate spam, paired with a practical Sieve email script to automatically filter these survey emails out of your inbox. The post explains what NPS is, why it's annoying and reductive, and provides a GitHub-hosted Sieve script for mail servers like Fastmail to move NPS survey emails to a separate folder.