Well, here's the story. You can win and win big. I played in the range of 10K and got my gold ticket. Not bad if I had stopped there, but I continued to play until I have spent a total of about 50K. I can well afford that, and much more, so it would be no loss if I had gotten nothing.
By the time I had gone through 50K I had accumulated many stacks of stat food (let's all get excited), many many quest gems, lots of other little goodies and two deluxe sewing kits.
Still not much you say? Nope, that's what I thought. Then I turned in the gold ticket and got a holgresh elder beads. Now to me that still looked like garbage, and I thought I'd have to sell it for a few thousand plat and eat the loss.
I play on Stromm server, and there have never been elder beads drop, I hear. Well, I was listening to the auction channel and someone said they wanted to buy holgresh elder beads. I simply asked for a price check on holgresh elder beads, including a link in my request.
Now the frenzy this started was literally amazing. I received five tells from people that were desperate to say the least. The first offered to give me 100K immediately for it. My jaw dropped! Obviously I had made a profit in the casino.
The next three offered 200K, 250k etc. and then the trade offers started coming in. They were willing to give me just about anything for those beads.
Two more dropped out at 250 and 300K, and I had two offering me more and more items, one with 170K plat and some very nice items. I went back and forth with both of them until I started feeling decidedly guilty for even considering taking one of their offers, and finally one dropped out.
I ended up getting a rubicite breastplate (also won with a gold ticket by that player), eight other items worth anywhere from 10K to 60K, and the 170K plat that was all the cash she had. On Stromm, the sale of those items should net me in the range of a half million plat.
So, now you know the answer. The casino is worth it in my opinion. But please, never play more than you can afford. As in real life, I do not plan to play any more than I can afford to lose and still walk away happy with the results. I still have all my armor, plenty of plat and whatever else a nice little druid needs to kill those darned griffons.