Seth Godin wrote about the state of DTC advertising and why it always leads to ruin.
His solution is simple, though not easy:
Your (current) customers need to bring you your (new) customers.
Eric Davis
Retain the best customers and leave the worst for your competitors to steal
If you're having problems with customers not coming back or defecting to competitors, Repeat Customer Insights might help uncover why that's happening.
Using its analyses you can figure out how to better target the good customers and let the bad ones go elsewhere.