Re: Guidelines - credit to SpaceX...
"You mean like pointlessly hurling a roadster into space, just because he could?"
Instead of a large block of concrete/lead - which is the traditional payload for test launches.
$HINT: It was a test flight of a brand new high payload rocket system with a self-professed 50:50 chance of blowing up before clearing the atmosphere. They offered a free ride to any takers, but noone was game(*). The roadster was cheap publicity (costing far less than the fuel) and the suit was the expensive part anyway.
(*)The last group who took a free ride on a new booster (Ariane 5) ended up digging parts out of a swamp.