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.