Somehow some people domt like being seen in the public that they are gambling that is why they use online ones.
I think they also play even if they lose to make it up for that lost money.
I might do that too if I am in the same position. Actually I already did.
It is not easy to let go if you are thinking all that lost and would want to get it back.
Recovering losses or unabling digest the losses are few reasons why people do find gambling as their solution for mental pressure. No one could blame them because they could not find the any other similar entertainment which will make them forgetting gambling.