I think there is use case in software like LNBits has working in their platform. They have a CSV suite where someone can create inventory lists and QR codes to print for the products on offline sales. I have considered building my own wallet for this specific situation, Where I would have a brick and mortar store selling everything priced in bitcoin over lightning. Zeus does offer an adjustable lifetime on lightning invoices but LNBits being custodial makes me uncomfortable with keeping a business of bitcoin on their platform. We are too early.
Discussion
It’s FOSS. Self host it
LNbits is made to be self-hosted along your own Bitcoin Lightning node. You can do it on a hardware that cost 200-300$ (or even less with a Raspberry Pi).
The LNbits demo servers, as I assume it's what you are refering to, are just for demo, like littersly in the name.
If you need support there will be many people ready to help on Nostr or some Telegrsm channels.
I am running a node. I set up the LNBits platform and it gives a wallet you pay to use per hour, I think 70 sats per hour. I didn’t spend that much time on the platform, But I saw the software for running a shop and played around with it a bit. The wallet said it was in beta and you should not load up a lot of bitcoin you would need, But I didn’t look much further at that. How do you. Connect your node and self host?