But they style themselves as "social enterprises" so they can collect funds.
When Sarah (not her real name) heard that her friend was earning $100 to $200 a day doing "direct sales", her curiosity was piqued.
But when she was led into an office with about 30 other youths and met the boss, she had second thoughts.
"I'm sure there's no need to tell you what this job is about. Just ask your friend to teach you," she was told.
The job involved selling cheap trinkets to members of the public for $10 apiece. Each sales agent had his or her own pitch.
Some would say they were former convicts from the Yellow Ribbon Project.
Others claimed to be students working part-time to support themselves or supplement their families' income.
After watching her friend in action, Sarah decided not to join as she felt it was not an honest way to make money.
"I understand if they need the money, but if you have a pair of hands and legs, you're physically all right, you might as well go work at McDonald's or KFC. At least it's decent," she said.