Doesnt matter on which one you would be touching up, it would really be profitable as long there's a demand into it.
On both sides, for the gamblers and for the operators. The profit is there mostly on the operators. And for the sportsbettors or gamblers for online casino games, the profit relies on their luck and analysis.
This varies because no one can guarantee that's going to be profitable on them as we have to deal with unlucky moments. While for the operators/house, the edge is always on them.
The casino will always be the winner in getting a lot of money, especially if many gamblers have bets using very big money. While lucky gamblers can get a lot of money, you can count how much it is compared to those who experience defeat. And whether it is an online or offline casino, the casino will always win big money. And this is what makes the gambling business always an attraction for people with a lot of money to open their own casinos. And the existence of the internet connection can make online casinos grow and provide big profits for casino owners because their members could come from various countries, so they can play gambling without national boundaries.