Dark & Light has an "official" server hosting option for players interested in a more robust way to keep a persistent server running. Nitrado is offering server hosting packages with several options for numbers of slots, FTP access, physical server location and at a variety of price points.
For instance, the Unicorn package at $26 offers 26 slots, clear Webinterface, FTP and My SQL database access, and 30 days of run time that can be renewed at will.
You can get a look at the static packages as well as the custom server that offers up to 200 slots by visiting the Dark & Light Nitrado page.