I just have to laugh at the extreme asymmetry of the down vs upstream speeds... the upstream is equivalent to 4 year old DSL. How about symmetry in speeds? Then maybe more people would switch.
I haven't seen any statistics as to what percentage of subs engage in 24/7 seeding. I know 2 people who own small ISPs and they say the VAST majority are just surfing, emailing, real casual use. Only a tiny fraction engage in BW intense apps like serving and seeding. If their experience translates to larger ISPs, it's only the nerd community really looking (and willing to pay for) for sym service.