Look for real ways to compensate customers for sales that aren't just sales to make money. Look for ways you can help them grow and continue your business for years to come.
And customers with a high LTV allow you to reinvest money in acquisition to fax lists keep the funnel moving.
Conclusion
When scaling a business through PPC and SEO, you need to consider two main issues:
Customer lifetime value and cost per acquisition.
Focusing on customer lifetime value first will allow you to spend more on acquisition and create better campaigns and a better customer acquisition cycle than you ever dreamed possible.
Selling to existing customers will open the door for acquiring more customers.