What SaaS metrics turned out to be completely useless?

Monthly active users. It signaled growth and activity and real interest from living people. Now it includes scrapers, good bots and bad bots. A number so inflated, it might as well be completely made up.

Vanity metrics like website visits are those shiny cards; they look cool but don't really help you win the game!

Any metric without segmentation might fall in this category. Conversion rate

Win rate

Mql to sql rate

Total visitors