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Re:Find a $1,000 a Month Business Idea from Reddit by k__ on Tuesday October 18, 2016 @10:07AM (#12734430)
Sounds like "Sales Safari" from Amy Hoy :)

I tried this with industries I deemed interesting, but found out it wasn't that easy. Most easy wins were already solved. Then I was stuck with getting deeper and extrapolating pains they might have but don't see, etc.