How does Stremio + Torrentio work?

I don’t have a lot of HDD space so I only seed torrents that I download to ratio of 2. Recently I discovered Stremio and torrentio add on. It is nice and l like the simplicity, but isnt it only leeching? I couldn’t find anything in settings that would enable seeding. If it is only leeching idk if I want to use it.