Actually, no money is spent on scrambling. Most of the encoders and decoders allready have the feature built in and its a matter of a flip of the switch.
Not true. For the proprietary types of encryption (I.E. the publicly unbroken encryption used for 24/7 networks like the type CW Plus is using...) it requires special receivers for the uplink and all the downlinks and these cost a good deal of money.
It's only the free, weaker type of encryption like BISS that is built into all of these and is free to use.
I imagine that the networks have to pay license fees to Scientific Atlanta to use their PowerVu and Motorola to use DCII, etc. in addition to paying for their expensive proprietary receivers, where as an ITC or BISS feed can use whatever cheap little receivers the company can find without need to pay any license fees.