Board Thread:Questions and Answers/@comment-34368958-20180504213505/@comment-32271305-20180504232120

On JP: 150 stones for 40 cards

On Global: 70 stones for 28 cards, plus tickets

You also know in advance what's coming, so you can save your stones accordingly. And no, the rates aren't rigged, they're simply very low, just like they were low on JP.