Not in many cases. Things like Bluetooth and WiFi chips have a simple CPU and then lot of custom digital logical and fancy RF components on the die. The CPU is

Not in many cases. Things like Bluetooth and WiFi chips have a simple CPU and then lot of custom digital logical and fancy RF components on the die. The CPU is only a small part of the design, both physically in the amount of area it takes up and also of the amount of engineering effort that goes into it. Correspondingly, it represents a small part of the value to the customer. Obviously the customer wanted a good CPU, but there are lots of relatively cheap ways to obtain a good enough small CPU. When I worked at Cambridge Silicon Radio, we'd license in various bits of IP like the USB. We might pay more for that than a small ARM core would cost.