Can you only purchase a Dark Artifact crystal once?
I was just looking at the timer for this batch of Dark Artifact crystals and noticed that the purchase button for the one I want to buy (again) is grayed out. When I click on it, it says that the maximum quantity has been purchased today.
I haven't bought one "today" (I bought the same crystal the last time it was available), so now I'm wondering if this is intentional? I've seen some mention of it, but nothing official that I could dig up after a few minutes of searching.