Agreed. I just tried to find the confirmation email from Simple to see when I'd signed up - "Simple" gave 200 false positives, "from:simple.com" found the email

Agreed. I just tried to find the confirmation email from Simple to see when I'd signed up - "Simple" gave 200 false positives, "from:simple.com" found the email. In a search-engine era being difficult to find isn't the most strategic move.