Addiction doesn't suggest earning anything from something thatwhat is controlling you instead of vice versa.  Also it would suggest some delusion where any chance to make money from gambling must be done carefully and knowing where your edge is and when to stop, none of that is about being lazy but excessively cautious most of the time which is close to work not for fun.
  You summed up why at the end, they got some easy money and its hard to not just want that path when its very hard to stay lucky.

Addiction doesn't suggest earning anything from something that is controlling you instead of vice versa.  Also it would suggest some delusion where any chance to make money from gambling must be done carefully and knowing where your edge is and when to stop, none of that is about being lazy but excessively cautious most of the time which is close to work not for fun.
  You summed up why at the end, they got some easy money and its hard to not just want that path when its very hard to stay lucky.