It’s much like a cell tower where a geographical area has finite capacity. You use your “priority” data that has speed guarantees, then it slows down, but is still unlimited. Apparently some users were reselling the link & maxing out the upload/download 24/7. (yeah, I get it, but in this case some kind of QoS probably needs to happen to turn a profit)

I’ve been a beta user since the first couple months of launch. They’ve had growing pains, but it has overall been light years ahead of our local WISP or Hughesnet/Viasat in terms of speed and reliability. Several of my neighbors have no other option than traditional geostationary satellite providers, and I don’t think any of us every want to go back to 600ms+ latencies!

edit: I just wanted to add that for many people, priority speeds for 1TB & having sub-100ms latency is far, far better than the alternatives.

Comcast has similar traffic caps for many of their plans. It's perfectly adequate for most typical users.