Gambling places are not for steady income, if you want steady income with gambling, online or offline, you have to be a owner, build your own casino and watch yourself growing up into a filthy rich billionaire.
I agree with the part that you cannot make a steady income in a gambling platform as a player, but even if you're the owner there's still no guarantee that you can make it a steady income the competition is very stiff, and it cost a lot to launch and operate a casino, it's not that you will become an instant millionaire by having a casino but you must have the right knowledge and expertise in running a casino, there are casinos that folded up a few months after they launch and there are casinos that took several months to a year before they get their return of investment.
Playing or running a casino there's a lot of risk involved, it's not a steady income right away.