Wow, I didn't know about this one, but at least I know about it today. Although I have not witnessed it before now, it doesn't sound strange to me because I have actually heard of other weird kinds of games. The popular bullfighting game also made people realize that there are more wired games out there, but some are not practiced in open spaces where the government can be aware of them.
I always found myself terrified of games like bullfighting and was surprised to see that people were putting money on it, someone's life is at stake but I guess gamblers dont have that mentality anymore after they are running for money.
Games are weird and when creative options are low, people turn to things that are downhill in the weird category to end up with games that makes others roll eyeballs and cringe.
They will always find a thing to bet on, it is human nature.
They do that for money so that may look strange for others while they don't feel that is strange. Gamblers can find a way to still gambling easily because they can use something for gambling. We never realize about that because we still use a normal way like visiting the casino to gambling.
Their creativity to use something to be use to playing gambling is no doubt. We can see that while drink cola, they can use it to bet and who is lose will pay the drink. Many more things that gamblers can use to gambling which we never know.
Maybe that depends on culture where they lived because we may not see that in other country. We can only say that is strange sport but for them, that is an interesting sport that they do.