Comment by asciident

Not really a productive venture, but it was profitable. I used a 3% cashback credit card on a financial company's money sending service with no fees, and sent my sister $3,500 every two days. She'd then eventually pay me back through bank ACH (also free). Then I'd pay off my credit card every week so my credit balance remained low. Made about $1,500 a month for a year, before they stopped giving cashback for transfers.