Following in the wake of increased scrunity over Comcast's use of measures to reduce the bandwidth taken by customer's P2P use, a similar situation has now happened north of the American border.
Large Canadian ISP Bell Sympatico has admitted to using various technologies to limit P2P bandwidth, during peak hours. The admission came after questions regarding bandwidth throttle were raised by concerned customers in the company's official forums. A forum administrator let customers know that Bell Sympatico uses "Internet Traffic Management to restrict accounts that are using a large portion of bandwidth during peak hours." The P2P programs that are affected include BitTorrent, and also non-Torrent based P2P methods, such as Limewire and Kazaa.
Customers in the forum requested further specific details on how this so-called "Internet Traffic Management" system selects which customers bandwidth to limit, but this information was not supplied by employees of Bell Sympatico.
Another way that ISPs are limiting their users is by dictating how much bandwidth can be used per day or month. For example, here in northeast Kansas, there is a cable company called Sunflower Cablevision (aka Sunflower Broadband) that limits users of their most-subscribed home Internet service to only 6GB of data transfer a month. Once that limit is reached, they throttle the user down to less than dial-up speeds. They then depend on the customer to call in and complain so they can say explain the reason for the throttling. If one is lucky, he will be able to convince Sunflower to remove the speed limit but he will also need to pay extra money for each 1GB over the aforementioned limit that he uses through the end of the billing cycle.
I find this highly objectionable because, when you work it out, one pays $40 for 6GB over a 30-day period. That means that a person is permitted to transfer (combined both up and down) only 204.8MB per day. That is about 8.53MB per hour, which equates to about 2.4K per second. In other words, the speed is limited to about the same as the SupraModem 2400 baud modem that I used back about 20 years ago when I ran a BBS. Given the fact that they offer a 7Mbps connection for that price of $40 per month, one should be able to expect to use that speed 24 hours a day, 7 days a week. That would equate to a full 2214GB if one used his full connection speed for the entire month.
I used to be a customer of Sunflower but happily switched away to another ISP who does not have any transfer limits. (However, they do occasionally (but not always) limit transfer speeds when overall network usage is anomalously high. I have seen that occur only twice in the past several months.)
My suggestion to anyone who has an unscrupulous company such as Sunflower is to ask questions about their policies before agreeing to use their services and make sure to keep on top of their changes in terms so that they do not create surprises later.