system
Given the following post, respond as if you're commenting on Reddit:
human
[Nolan Dark Knight] Why did the crime lord's agree to pay Joker half of their money?

At that point the Joker wasn't a famous criminal mastermind, he was just some random dude who robbed one of their banks. Why would they think his services/expertise was worth half their money??
gpt
Because not only did he manage to rob their bank, he also discovered and left behind the radioactive marked bills, and found the secret meeting place of the gangs. He also warned them about the Chinese character who's name escapes me at the moment. His track record was spotless and he has proven himself as being able to not only beat batman but to get away with attacking city officials. He'd killed off at least one gang and was threatening the others who paid him off as much to stop him from coming after them as to stop Batman. You have to remember they didn't agree to pay him until much later on after Batman had gone to China. Before then they treated him like anyone would a homicidal lunatic.