The number of people that need to be hit by a bus before their project is dead.
"Our engineers work in teams of 10 for the higher bus factor"
Useless data that looks good but does not necessarily correlate real success.
Bob: Our website gets a million views daily!
Mark: How many of them are you converting to paid users?
Bob: Well.. we are still working on that.
Topchart vanity metrics list http://www.topchart.io/lists/vanity-metrics
When a startup makes enough money to pay for the founders' living expenses. To read more check out Paul Graham's post on it
Matthew: Just because it's called ramen profitable doesn't mean you need to be eating ramen all the time. There are other foods in the same price range.
Kilim: Wait I don't?
employeeNumbaOne
It is well known that engineers make a "SPOF" sound when hit by a bus.