I agree that not paying a bill doesn't make sense, as I, too, thought that their business was thriving. I'm just considering other possibilities
Correct me if I'm wrong....
https://who.is/whois indicates the Domain Name registration. It legally belongs to someone, and they can do anything that they want with it. You can register a Name but not have a Web site. Once you have a Web Site, then the IP address of the Host will be associated with the Domain Name via a DNS provider.
Tracert gives the result of:
Tracing route to lunapalace.net [185.230.63.186]
& the last hop is: 14 62 ms 66 ms 99 ms unalocated.63.wixsite.com [185.230.63.186]
So as you can see, the the Domain Name Resolves, but WixSite is currently not providing the Web service.
If LP intentionally shutdown, and no longer pays for the Web Site Hosting, the Domain Name with remain active until 8/24, as you stated.
I am hoping for the best...but acknowledge that the "worst" could be possible.