Creating and maintaining a distribution of Linux is hard enough without operating a network of mirrors.
Your browser is about to be connected directly to the WebTorrent network. That means that the more people that use this website, the faster it gets for everyone! And because it works across domains, everyone across the network benefits if distros integrate WebTorrent for distributing their ISOs. If you maintain a version of Linux, it's easier than ever to distribute your installation media, no mirror network required.