> What about the first month they make money?
Mattermark has nearly $300,000/month in revenue and several dozen plus employees. It's not newly hatched, and it's a fairly straightforward B2B play in which customers pay for access to a service.
At what point would you suggest that metrics like rent to revenue become meaningful? 10 years in? When its revenue reaches some meaningless, arbitrary amount? When NASA announces the discovery of extraterrestrial life?
Just look at slide 12 at http://www.slideshare.net/DanielleMorrill/mattermark-2nd-fin.... Less than a year ago this company was projecting $400,000 in monthly revenue by June 2015. According to this post, it generated less than $300,000.
This is precisely why you pay attention to metrics like rent to revenue. "We're VC funded and the rules don't apply to us" doesn't work forever, and it often works for far shorter than expected when growth in revenue starts to lag projected growth in revenue and your spending has been based on projected revenue.