Looks like it works out to $2/night (you earned $50 in about 25 nights), which isn't terrible I suppose.
EDIT: It's actually about $0.16 (16 cents) per night, see calculations later in the thread. Not counting electricity costs, signup time, etc.
/END EDIT
Seems best for those with a debt emergency, lots of time to do mundane tasks, or those with a low earning power. College students, basically. ;)
EDIT: With the new calculations, not sure it's worth it for anyone.
/END EDIT
Thanks for sharing all that info!