Evidently some low-level torrent trackers are banning Windows 10 due to paranoia over the new OS.
When it comes to the world of bittorrent, you cannot sidestep the big red flag that the majority of its usage is for sharing copyrighted material. Sure, torrents have legitimate uses, but let's not kid ourselves that most users are trading music, movies, games, and comics.
Putting that background into context and it is understandable that people running private trackers like iTS are slightly paranoid. After all, their business can be one fraught with lawsuits and criminal penalties.