Looks like they are sending out emails now although I my wife got orange instead of gray:
Dear Disney Guest,
We are so excited for your upcoming visit to
Walt Disney World® Resort! We hope you are enjoying the planning experience and looking forward to visiting us.
We are reaching out about the recent MagicBand order you made through My Disney Experience. Due to strong popularity, one or more of the upgraded MagicBands you ordered ran out of stock, and therefore, we are unable to complete your order. You will not be charged for the upgraded MagicBands that are not shipped to you and will receive a solid gray complimentary MagicBand instead.
We recognize the inconvenience of this situation. Therefore, for each upgraded MagicBand that we are unable to fulfill, we are providing you with a one-time use promotion code* for a credit of up to $15 toward the purchase of one (1) MagicBand ordered on
shopDisney.com. We are also including an additional promotional code that will cover the cost of 2-Day Express Shipping of your MagicBand portion of the order on shopDisney.
Please visit
shopDisney.com/MagicBands to choose from a variety of in-stock MagicBands. When you proceed to the check out, apply the one-time promotion code provided below, then complete the shipping and payment information. Most orders will ship from our warehouse within 2-3 days, and you will receive an email with tracking information once your MagicBand order ships.
Please accept our sincerest apologies and know that we want to make sure your vacation planning stays on track. Thank you for your understanding and we look forward to seeing you real soon!
Sincerely,
Guest Experience Team
Magic Kingdom, Inc.