They need to start looking at alternatives. And LN's the best bet.
Will they looked at Litecoin at least considering it's the identical to bitcoin and has low fee and faster execution. The thing is will they still see as freebitco.in? Well, I know this was just a domain name but this issue of transaction fees will have to be addressed first. Lightning Network was the best option to take since a gambling site doesn't profit from just transaction fee from withdrawal and deposits.
But its a big problem for gamblers to have a huge fee brought by bitcoins and if they will never take an action towards this issue maybe there are small time players will quit since they can't afford to pay huge fees for just playing here, maybe the best solution to implement is the lightning network and also its good to have an option like adding LTC since its also good to have, just disregard the name since it already got a reputation and players doesn't care about the essence of the name since majority wants a convenience.