It means you don't have to worry about any fuel quality issues or deposits in the carb.
I wouldn't get too wrapped up in trying to approximate load. If you must run it to sleep well at night, plug in, whatever. And if you don't think that's enough, plug in a few whatevers.
Used to be the "recommendation" was to keep the field windings from de-magnetizing. Honestly can anyone who is adamant about this relate an actual experience where the windings needed re-magnetized or corrosion kept the generator from operating properly?