So then why not spend 2% or even 3%? By your logic it would probably still be cheaper than most lean start ups and still make sense. You can't run a business b

So then why not spend 2% or even 3%? By your logic it would probably still be cheaper than most lean start ups and still make sense. You can't run a business by comparing what you spend simply as a percentage of revenue or as to other, unrelated, models.