A month cool-down is nothing. At a minimum I would say it should be a year cool-down, although the cool-downs in general would be easy to circumvent. The shops should also be edited so the status message on legendary pulls shows directly between the spin button, so it is more transparent when they are not available (especially to future members who are unlikely to ever read this news post).

I also feel like the fact the custom was pulled before a lot of us had even signed on for the day, is a sign of just how much there needs to be other high end rewards that can be earned through general rolling. A tier between legendary and rare that has exclusive pets/clothes/other items. Perhaps there could even be an option for custom owners to opt in to allow their items to be earned in this manner. We need more potato sinks that don't rely on being the only lucky person to pull a custom in a week.