I don't think the ISP is doing anything since some users can get all the way to 100% without being interrupted. It's rare but it happens. Most users restart their uploads every couple of seconds. Why do they get interrupted so often? What causes the interruptions? Once they're connected and downloading, shouldn't they be able to maintain the connection? I'm curious to know why users sometimes have to restart their download every few seconds while others get all the way to 50% before it happens.