One of the reasons I don't seed back is that I can't - I can't seem to figure out how to configure correctly despite setting all stuff about ports and connections I can on qbt. One of the problem is that, for privacy reasons, I'm obvs not using my own infra but rather hooking into someone else's network, so there's not much really I can change.
And the other reason is that I tend to rename, change and repack most of the stuff I download (series, games, etc) for size and convenience. Especially, I tend to downscale 1K or 2K movies down to 540p or 720p and I tend to rename and reshuffle files across folders, so that pretty much renders the storage as invalid for seeding the same torrent (unless anyone knows a trick I don't).