It’s only a zero-sum game on trackers that don’t enact counterbalancing policies, which most do, so it’s braindead easy to keep a good ratio. Usually some combination of freeleech torrents and bonus points for seeding even when nobody’s downloading, which can be spent to boost your ratio. I’ve never owned a seedbox in my life, and my ratio is over 10 on most sites I’m on, even when my “real” ratio is closer to 1 or 2.