I have tried a seedbox before, but the bottleneck is the last mile of my home internet. I just have a Raspberry Pi 3B+ hooked onto my router via ethernet. I just log onto qBittorrent and tell it to go as I sleep, and turn it off when I wake up. The downloading is done already onto a spare laptop drive I have, and then I watch it via Jellyfin or sneakernet it over to a friend.
I won’t say a seedbox is useless, I think it’s great, but due to how my living works, it’s not great. I’ve waited several minutes for a few PNGs to download, game updates often take hours. Not even counting how the actual fucking wind slows down my internet, due to the copper wiring being on poles like electricity. And I live in a place with so many windmills due to the natural features of the land creating daily wind storms from 4 PM until 7 AM.