In our country kids catch spidera and let them fight on a stick. You can also see adults doing the same and guess what, they are betting money with it. The question is, will this kind of gambling catch gamblers attention online?
I can't really see any international online market for spider fights, you would maybe see a few people who will bet a few dollars on a random spider and watch the fight on their screen, but this will be a very small group of people.
It is more common with gamblers who are not rich enough to bet more with big amount. Only those gamblers who are playing with small bets will play such games either it is a spider or any other insect. It will result in nothing much big profit or earnings but it is clearly wastage of time. Better a gambler use this time in providing services occur in daily life will even result in clear earnings without any stress.