Depends on the cap and usage obviously, but our family of 3 has been full streaming for 2 years now, and we rarely go over our 1tb cap. Maybe 3 times over the last 24 months. Never been charged for it.
Others usage may definitely exceed ours.
You're killing me. The usage cap on a big HughesNet package is 50 GIGS, the base package is 10 GIGS.