It’s just a remote server you rent that has either a web interface for a torrent client and/or the ability to shell into your instance and use a terminal based solution. You tell the remote server to handle the torrent. It downloads it to the server and also seeds for you. Then if you need the file on your home machine, you can grab it via ftp sftp https wget whatever way you want. To your ISP it’s not torrent traffic and even better, you can vpn to tunnel or use baked in means to make this transaction encrypted. In short, you can seed forever without impacting your own internet and you can keep your actions relatively secure and private as compared to opening a home machine up and letting loose.

23.79 TB uploaded 2.32 TB Downloaded 10.273 ratio

From my primary seedbox. This is probably my best ratio and upload total but I’m more proud of maintaining a decent ratio on higher downloads with more competitive trackers :)

Just get a seedbox. No reason to use your own bandwidth or have torrent traffic on your own ISP. I just use bytehost and it’s also hosting my plex server. I’ve also used seedhost.eu for a long time without issue but that’s seedbox only (no extra apps like plex or sonar etc)