Those schools usually either hire two groups of people. One is a bunch of unqualified alcoholic losers who are happy to dance like a good little white monkey for a job performance that even McDonalds wouldn't tolerate in their native countries. These idiots are usually delighted to work for the training center--and who wouldn't? I've known buffoons who slept through their own classes at least once every two weeks and still had a job that paid them an unlimited booze allowance.

Or, they prey on enthusiastic, prepared, and naïve kids who just graduated from university and see ESL as a vehicle for travel/education and saving for graduate school. They are stupid for getting trapped into those schools, yes, but they are usually easy pickings for the training centers because they are brand new to the job market, period...and definitely do not understand the extra jaded lens you need to view China's unregulated ESL market through. They start happy to have a job, then get disillusioned...because they got degrees and creds to be a teacher, and usually end up playing duck-duck go as a substitute teacher for their douchebag co-worker who called out hung over.