Recently I thinking about this question, I'm new to private tracker
things so its answer is up to veteran torrenter.
I've made a poll for its possibly answer. Please vote mate and give me the reason.
AFAIK, all big trackers come from small one first.
It seems I can't see the option for poll creation.
Then here is some possibility:
1. Content and uploader
2. Staff and rules
3. Community and forum
4. Speed and retention
5. Eliteness and niche
6. Media and hype
7. Other
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