It's not that I expect authors NOT to pay to promote, but I'm growing more and more concerned that these marketing strategies are turning into gambling habits. (buildbookbuzz.com)
If your online gambling habit is a secret you keep from family and friends, there is a likelihood that it is becoming unhealthy. (thefreefinancialadvisor.com)
In 2005 a Mayo Clinic study found 11 cases of patients who had developed gambling habits while taking dopamine agonists for Parkinson's disease. (health.com)