Why does the second pc double it ? Why not just capture the video output as he sees it on his screen ? <| sep |> Yeah , I suppose it is technically true , in the sense that there is more than one ISP in most places . At least with an airlinestyle oligopoly the small number of providers are reasonably equivalent . With ISPs they usually aren ' t . Often only one of the ISPs in a region offers consumer broadband with 20 mbps , with the other consumer ISPs offering things that are much slower , such as DSL , dialup , or satellite access , or are prohibitively expensive cellular . The US should take a good hard look at what they did in London . They too had the problem of there being very little real competition among ISPs . What they did was require BT to 1 lease lines to other ISPs , and 2 lease space in BT equipment centers to other ISPs . They soon had dozens of ISPs who had leased equipment space from BT and would lease lines for their customers . Competition drove the price way down and the level of service way up . BT had initially strongly opposed these changes , but it turned out that they ended up making a lot more money from the line and equipment space leases to other ISPs than they would have made providing service directly to those other ISPs customers . When BT was fighting against this leasing requirement , ATT and Verizon both submitted letters to the regulators arguing in favor of the rule , pointing out all the good it would do for consumers and for BT . Of course whenever anyone does propose such a thing in the US , ATT and Verizon come out strongly against it , predicting that being forced to lease lines and equipment space would completely destroy them .