If you go lean, revenue is everything. You start with something small, you fight to get every single customer, you grow with every project, staffing up another developer or sysops engineer paid from your own pocket to do a bigger project than the past one, trying to get your "side-product" ready to not be dependent of more projects at some point...

And then, you've the Double Stealth. Why bother with revenues, if VCs are throwing money at you? Why bother with customers at all? Why bother with products? Hell, why not just completely hiding what we do, as long as the money is flowing? Problem? :D