Got a smartphone? You can get 500 free station cash through everquest worlds http://thelonegamers.com/free-station-cash/
How long does it take to do all the things for Everquest? I noticed its divided into two lots of 250 for completing two tasks and one involves facebook.
The first task is basically taking a bunch of pictures, it took me all of 5 minutes, there's a youtube video with all the pictures you have to "scan" in sequence here: The second one is liking their crap on facebook and some other stuff, I don't use facebook so I didn't do it.
If I knew how long it took to do the facebook stuff I would do it and then undo once I got the station cash.