It is common sense to implement lighting in any payment platform not just on casinos. Even if only a reduced amount of user is taking advantage of it, it is already an attractive feature that can be great to bring new users. Lighting is perfect for people who play at large or want to even have some automated betting around as the channel will make much easier and cheaper to play.
^ It is Lightning Network.
But why we are rarely seeing such casinos using a lightning network, probably I have doubts about myself this is hard to implement or it become more complicated. However, on my side, I really like this system because everything becomes cheaper from all transactions from deposits until you decided to withdraw your asset. It is good if someone will create a thread that has a list of gambling casinos that accept lightning networks.
He is a legendary member so I bet he already know that it was called lightning network, not lightning but I think he only shortcut it although it's unusual to shortcut it like that but usually people will prefer calling it as LN if they are lazy to type the whole thing.
I've seen LN on many online shops and other platforms but I rarely saw it on crypto gambling sites. Maybe there is an explanation about it that we don't know because we didn't own a casino but only casino owners knows it? For us small time gamblers, we love it when we can only spend less when it comes to depositing and withdrawing. LN can do that job perfectly.
It is good if someone will create a thread that has a list of gambling casinos that accept lightning networks.
This might help you out ->
https://bitcointalk.org/index.php?topic=5255329.0