That is so spot on. Put another way, the seed round is a peek to see if you can do what you say you can do, series A is a bet you can make it profitably, and series B is the gas to grow the market. As soon as you know your cash and your profitability cross below the 'zero' line you calk your investors that week and you ask them, call it or push forward. They say no, then you just roll it up. And I know, that is much much easier to say than to do.