The problem with that is that once the 'neutral leech' period is over, the same level of reluctancy will kick in and people will continue to avoid 'larger' torrents because they want to keep a 'good' ratio, despite what's rather generous ratio rules. So the "benefit" will be rather minimal, especially since not many users actually do seed long term, including those with crappy bandwidth.
I should know, since I've been seeding stuff there for years.
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