There's nothing stopping you from doing that. You'd soil a blossoming business relationship that's paying $20/day for minimal effort. You could also copy our keywords, ad copy and create your own campaign with the same designs that we're running. I wouldn't want to compete with us but you could try it. Google is a long game. If you can sustain that then by all means, otherwise I'd stick with the $20/day.
Then what's stopping you from posting your "legal" business in the original post.
You are caught in your own lie now
Ok if he does not want to post his niche and business publicly, its his right but i am wondering has he hired someone to do the task and did he paid anyone 20 bucks a day ?
There are few people who said that they have DM him, did anyone deal with him and got paid or got scammed
I hope whoever works with them, will prioritize their own security rather than money. Since OP fails to provide any assurance other than his own words.