I wonder if Xfinity hotspots could be this? Are you using their modem / router ?
Edit: also glad to hear Usenet is doing well. I switched to it a long time ago and uses for a bit. Though I remember so many items being removed due to dmca. All my downloads were just text files saying removed by dmca over and over again. So I ended up switching back to torrent via seedbox. Now I just use real debrid. Don’t feel like bothering with other setups lately lol.