I believe Macaw.casino is one of the first gambling services that will have a sign up-less feature,
https://bitcointalk.org/index.php?topic=5405538.0The casino requires the user to make an account for now, but if their schedule for new features are on time, it will be removed and the casino will run everything on top of the Lightning Network. THIS is the ACTUAL point when I opened this topic.
Our questions will be answered when sign up-less feature, and no-KYC are implemented.
I don’t think the idea is new. I remember I played on casinos like this long time ago but I can’t remember their names. The one I remember very well is directbet.eu. It was all automated and you didn’t have to create an account or anything. You just send the coins to the address and pick your bet and if you win they were depositing back the money you deposited plus your winnings to your original address. They went out of business sadly.