You might be able to get some customers with that spend on average, but could have hit zero just from bad luck (randomness is clumpy). Customers can easily cost

You might be able to get some customers with that spend on average, but could have hit zero just from bad luck (randomness is clumpy). Customers can easily cost tens of dollars to acquire. As an example, for my own subscription box service the cost to acquire a customer from YouTube ads was ~$49.