Drewman
Like others have mentioned, the Bonus Zone is a great way to take advantage of large block of data (by comparison), and, at least with some things, you may be able to schedule the downloads/uploads/syncing. Also, keep in mind that, though what you are able to do, or do easily, can be greatly affected when you go into FAP, you're still able to use the service without any extra cost or penalty, and that never stops.
And, though having individuals using the system on an unlimited fashion for one day probably wouldn't tax the system to any noticeable extent, even if there were a few dozen people doing this on any given day, they'd have to allow everyone to do this, as allowing only "top tier" customers to do this might suggest, at least to some, that their business isn't as important to HughesNet as others.
Satellite internet definitely takes some getting used to, and that can be harder as devices are added and they become more data hungry. And, of course, the Cloud... the bane of limited services. :p