Maybe, but have they yet? Until the concept becomes massively popular, there is still a business opportunity. Keep in mind also, that it only matters that the

Maybe, but have they yet? Until the concept becomes massively popular, there is still a business opportunity. Keep in mind also, that it only matters that the end users get more money from their bandwidth than it costs them to buy it from their ISP. As long as operating a distributed CDN node is more valuable than just the bandwidth to drive it, then there is still a business model. That added value is from the spare disk/cpu the end user would be contributing. In that case ISPs might jump into it themselves, but I still see that happening only after the idea became massively popular.