That’s probably exaggerating a bit, after all, mQuark was just giving an answer, and I can assure you that when you hit the cap you will indeed be happy with that 100K hero XP.
PerBlue does indeed never refund the diamonds spent on those chests, and that seems logic, since they can’t check whether the purchase was on purpose or not.
And @mQuark_S2: The people who accidentally bought chests were always asking for a confirmation button on the x10 chests button.
People (except for lefties ) apparently also scroll on that side of the screen, which makes it easier to accidentally click the button. Thinking about it that way, and taking into account how people usually want the least amount of clicks possible, this makes more sense.