User blog comment:Crazyboingboing/100 coins/@comment-24577221-20150118052945

I posted the probabilities of the various scratch card prizes here. The odds of getting the 1000-diamond prize are 1 in 10739, for what it's worth. And no, buying scratch tickets in the game is no more cost-effective than buying such tickets in real life. But it's a thing that some people like to spend money on for whatever excitement they get from it, even if they understand the odds, though most people who buy them really don't understand that they're probably going to lose.

The probability of getting the lowest-value prize, the small number of coins (which does scale up with higher player levels), is 37.2%.