It's a good idea to use an H-H motor if you have space constraints regarding where you have to place the dish. Also, as opposed to buying a number of fixed dishes, this helps with budget constraints.
It's a good idea to use fixed dishes when you have space to mount a bunch of dishes. Also with fixed dishes or multi LNB setups, you don't wait for the motor to move if you are a channel surfing maniac.
I learned about FTA on the Internet. The best guess is: I was looking on eBay and the Internet for TV tuner/capture cards for use with a PC. Then, I discovered DVB PCI cards.
Then, when I searched around for information on this new PC accessory, I saw a reference about "free-to-air digital satellite TV". What is that?
I don't do cable TV. No matter where I lived, somehow the cable companies found a way to infuriate me. I bought a E* system and installed it myself years ago. Even though I had everything except for movie channels (AT250), often there was still nothing on. This free-to-air satellite thing sounded like a low cost way to get access to more programming. Sometimes FTA programming is more interesting. Also, the fact you never know what you might find is fun.
I imagine I learned about Sat Guys from a web search. This site was a plus because I could learn about E* and FTA. The eye-patch sites seemed too much like warez sites. Between having the fear of getting a virus from them and hearing about the legal trouble D* pirates got into, getting pay TV for "free" just didn't seem too smart...