"He discovered that the eye on the satellite was faulty and replaced it. In Febuary we received our bill with a $49.95 service charge."
I believe you are referring to an LNB (low noise block-down converter.) It is common for these antennas to have 2 or 3 LNBs. These are electronic circuits on the antenna that are powered by DC voltage supplied by your receiver. Static and induced voltage spikes on the RG6 (induced by nearby lightning activity) can "blow" these LNBs as well as your receiver. This is why it is very important that the dish antenna and the RG6 cables are properly grounded.
You need to check your antenna installation to verfiy that it is grounded. Almost all of the Direct TV and Dish network installations I've inspected in my area have been installed by contractors who save money on parts and labor by NOT GROUNDING the antenna system.
"and suggested I add their $5.99 monthly protection to avoid this service charge in the future. This is just a marketing strategy to force customers to pay extra monthly fees for their protection plan and as such is an unethical way for them to avoid taking responsibilty for faulty equiptment provided, delivered and installed for them."
I agree completely with you. I think it's actionable that they can have the antenna system installed by THEIR contractors, not grounded, and then charge their customers for service when the antenna or the receiver is damages by voltage spikes because of the FAULTY ANTENNA INSTALLATION. Also note that on the Direct TV and Dish Network websites, they clearly indicate that grounding hardware and grounding of the antenna system is INCLUDED with their "professional" installation!
Yeah, right.
I would check your installation and if the antenna is NOT GROUNDED IAW the National Electrical Code, I would send them certified letter to demand that the service charge be credited and that they schedule for someone to come to you and PROPERLY GROUND the antenna installation IAW the NEC, sections 250, 810, and 820.
Good luck.