Thanks for highlighting this. I'd say one of the two biggest reasons businesses fail is that they don't keep adequate data to be able to know what's producing the best returns and what should be eliminated. If you have that feedback (and use it) you can keep refining. Then you just need enough time/money to do that until you're successful. But if you don't use feedback from the data you're already getting from the market, you flailing around blindly until you run out of time/money.