I'll admit, when I first started torrent I was not really familiar with how it worked and how important seeding was. I would just use magnet links without configuration to save the torrent and seed after completion. Well.. I have finally, got myself back to 1.00 after a couple months and working to try to always seed double what I get for each torrent.
Often times I was one of the few random seeders available for some of these torrents. Friendly reminder to give back because you never know when you're one of the rare cases that can complete someones long lost file download!
There's a private sports tracker I've heard of that rewards long-term seeding. What's cool about that is that most sports events are only relevant for a few days and then people move on, this is especially true for big fans of certain teams who want the latest event. But, if you reward people for seeding, they'll just keep some random game or event around for months. That means that if something suddenly becomes relevant months later, you can probably still find it.