people only want to seed for a short period of time , it uses to much resources , i only seed for a week after downloading before removing it from my list. therefore there will be lower seeds on older torrents
when new thing is come every one wants to download it and therefore seeders are higher but when thing is older most of the downloaders except uploader of that file remove it
every one wants to download new files
because new torrent like new movies are downloaded by many people and u see when downloading u also seed much.
many people left to seed when new thats y there are many seeder and lecher for new torrent and popular torrent......