Slot games is good but I do not prefer only the slot games I prefer those gambling sites which has casino as well as sportsbook. I think you should choice those gambling sites which has slots as well as casino and sportsbook. And if so you will get a lot of gambling site where you would be able to gamble.
Most casinos are not dedicating not only slots games as players want other games to be played with.
Very rare that you can encounter casino with slots games only, usually it is combined with dice, roulette or crash.
And most of the casinos now are also integrating sportsbooks because there are so many sportsbettors also.
Casinos need to diversify their services so they can attract as many players as they can.
If they will only dedicate their site to one game, it will limit their number of players.
I agree there may be casinos dedicated to one game like Crash games but they are beaten in terms of profit by casinos who have more than games that they can offer to the community, the community is very diverse you should target as many interests as possible to entice players to play more, the more players you have playing different games the more profit and money coming in, I myself choose 2 to 4 games to play in my time and money allocation.