Typically, ratio private trackers have bonus point systems that you can exchange for free leeches or upload data. Read the rules for bonus points. You can maximize your points by being smart with your downloads. Downloading small torrents that are old, free leech huge torrents, torrents dying, etc. Depends on the tracker.
If they don’t have bonus points, trackers also offer free leeches…that you need to snatch asap…if you download those everything you upload goes to your buffer.
I’ve been in many trackers and made TBs of upload data without having a seed box or uploading new torrents. It’s just a little patience and then you’ll be able to download whatever.
What was newyuzupiracy for?