Re: ´How come every damn gamemaster has spinnerbox?
If you want to know a tip for getting the second part of the achievement (winning 500 gold in one sitting I think), the easiest thing I found to do was sit down for a game of Keystone and place the max bet on all the Trips options (along the bottom of the board). Roll once, and if you get any set of trips your all set. If you don't, cash out from the game and then sit back down again to repeat.
If you try to keep winning without ever cashing out, your losses just pile up and make it very hard to win 500 gold or more.