Just romance scams out of SE asia by chinese gangs using forced labor/slaves lured to their compounds are estimated to bring in 40 billion a year. I got on a dating site, and had 3 of said romance scams on me, the pig butchering ones wasting a significant amount of time as they play a long game and don't give away their game until a week or so into it, they ease you into how they make money on some investment to get you hooked to milk you and show you fake returns on it but you need money to get your money and more and more and then when you are out of money or refuse to give more fuck you, we scammed you.

It's mostly dudes they have captive they beat, it's not even a woman you are talking to in these pig butchering scams. And the migrant laborers that get lured there from other countries oftentimes, like India, if they don't speak english well enough they might sell them to Palm Oil Plantations, which is another level of slavery hell.