If in case they will get back again, you are very welcome as you've proven to be an honest casino.
Maybe, just keep your site's domain and who knows, later on, you will find a better way to run your casino.
They should retain their domain for continuous branding in case they got partnership or they have investors willing to invest, it's good that they let us know that they are shutting down, they are very much welcome to come back here they have zero complaints and I'm sure they've got a lot of players coming here.