I think most people gamble for money, not many gamble just for fun, especially if they gamble online
Nobody likes losing, this applies to anything, not just gambling. I think, although there are people who gamble for fun, they won't be happy if they lose. If he loses often, then he should stop gambling because there is no fun anymore, but if he continues to gamble then he is gambling for money, he is chasing his losses.
So I agree that most people gamble for money, not for fun. I think the figure is more than 80%, maybe more than 90% but this is just my opinion, I don't have any data