Studies have shown hard drives fail at a rate of about 4%/year. Assuming your 5000 users are a representative sample, this means you should get about 200 complaints per year just from hard drive crashes. Considering the fact that your 5000 users are more tech savvy then most and as a result ironically suffer more downtime than most, the odds are not that low.
In any case, this is all fairly besides the point anyway, some trackers are strong enough to just be able to enforce ratio rules, others must resort to this petty crap.
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