The basic appeal of keno, that you might win big for a relatively small investment, is exemplified in progressive keno.
If you want to take that idea to its extreme, find a casino that offers progressive keno.
The only difficulty is that your chances of winning the big prize are almost illusory.
In most progressive keno games, you have to catch 9 out of 9 or 10 out of 10 numbers to win the progressive jackpot.
In order to catch 9 out of 9, you have to buck odds of 1 in 1.38 million, and 10 out of 10 is even worse at odds of 1 in 8.9 million.
If you do manage to beat those odds, the payoff for a $5 wager may only be $300,000 or $400,000, and sometimes a lot less.
Of course, there are also smaller payoffs for catching fewer numbers, but you get those in regular keno as well.
The house edge in a progressive game is a function of the size of the jackpot.
If you really want to play the progressive game, at least make the house percentage calculations as described above, and only play when the progressive jackpot gets very high and the house edge gets very low.