Yes, the channels can change without notice according to what I could find online. I agree about taking a chance
with the hardware purchase, and then finding out it's not as useful as you thought. From what I could find,
the channel lineups are pretty much the same as domestic OTA TV now. The only possible advantage might be
the ability to have TV out in the boonies, and there are many more international channels available that may
be able to be viewed, although I have no idea how many international satellites are visible from North America.
I found a list of free satellite channels by country, alphabetically, and it was quite long.
I doubt I'll look into it any further. For now.
p.s. I still see those old 10 footers in people's yards every once in a while.
I'd think they still work if just getting the free channels, but the newer
Ku and C band dishes are smaller between 75 and 95 cms I think I saw?
Larger than ExpressVu or Star Choice models, but not beach umbrellas.