Groupon CFO Jason Child was on CNBC facing one his harsher critics in Jim Cramer.

Some of the key points he made:

• He says revenue per customer has been increasing ever since Groupon launched.

• Groupon is spending $700 million per year, and nearly break even. Child doesn’t think it will need to spend more on marketing because at $700 million annually, it’s plenty to grow going forward.

• Cramer thought Groupon wasn’t selling enough stock. Child said that floating $805 million, is sizable.

• Groupon’s big base of customers and merchants is its killer advantage.