Only porn stars will partake in this competition and I will not bet on such.
Sorry to prove you wrong that not only porn stars will partake in the competition, many people will show interest and in fact we already have one here
Rather than to be the bettors, I would like to participate as the participant, even I didn't win at least I've fuck someone. 
Can't believe this
you're joking right?If it turns out to be real, its going to be the first sport without real spectators because I don't think any sensible human will be interested to pay just to see another person having live sex. There would probably be a lot of rape cases after the show.
However, there are still people that will join the sex competition because they wants the money, besides we leave in a world that money is everything.
The truth is that many gamblers will still bet on the sex competitions with anonymous casinos as long as the casino offers it in public.
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Either participant or bettor, it's disgusting.
If the participants and the bettors are disgusting to you, it means that the betting sites that allows it on their sites are also disgusting