Olympic sports get coverage if there are potential medalists. BMXing and Curling are never on TV (except maybe on a sports channel at 3am for a few minutes when nobody is watching) in the UK. But when the Olympics come round all of a sudden our medal contenders are famous for another 15 minutes. The biggest single TV market (the USA) would take an interest because they will always have 3 players (assuming it is 3 entrants per nation as in many other sports) who have a chance of winning gold in any pool variant.