This what happens when chains are just copy-cats of the others, nothing much new in the code or how they operate. Just copy-paste. One chain gets an exploit and all the other will have the same problem.

Another important thing is to always use virgin address when interacting with smart contracts. Only what one wants to trade or exchange should be in the address and not the whole portfolio.

I hope the traders revoke the permissions fast enough before they become the next victims.