I agree with your assertion. There's no _real_ issue here of overusage... as long as the ISP makes MORE money in the process, and has some control on that aspect. This isn't a whole lot different than Comcast TV over the Internet, and Wireless (cellular) data ToS, where unlimited plans exclude downloading, streaming of video, etc, UNLESS it is through their services (i.e. VCast or MEdia with Verizon Wireless or Cingular).
