Ok: "rich, healthy" customers. "[well-]insured" is correlated with "rich", at least in the US. The point is, it's easier to worry healthy rich people ("worried

Ok: "rich, healthy" customers. "[well-]insured" is correlated with "rich", at least in the US. The point is, it's easier to worry healthy rich people ("worried well" as you say) that they might have a disease, and you can repeat that multiple times, and recruit their friends too.