Lines were still open if your
DVC vacation was within 5 days and you could not wait until the next day to discuss your vacation issue regardless of blue or white card. So if you had a legitimate reason to discuss your vacation issues you were instructed to call member services under the above circumstances regardless of card color, otherwise there is no reason to make an issue over something that could wait 1 day. As others have said if you were not booking a member cruise yesterday, regardless of card color you generally should not be calling in. There is no discrimination in the way it was handled.
As far as booking cruises the DVC there nomally is a separate team that handles these bookings. When you call into DVC and want to book a cruise you select a different option than regular member services. Considering the popularity of the member cruise and the long wait times to get through to member services, member services did the right thing by making this an "all hands on deck" situation where only those booking the member cruise or needing to call about immediate DVC vacations should be calling in. This is just member services doing their best to provide the best service to their members as the situation calls for. Unfortunately there will always be someone who is not happy regardless of what is being done. Being able to call in for immediate upcoming vacations did not discriminate by card color.
Regarding blue vs white cards, when someone purchases into DVC they have a choice to make regarding purchasing directly from DVC or buying on the secondary market at a discounted price. If proper research is done prior to the purchase the purchaser should be making an informed decision and understand the limitations of purchasing through the secondary market. If the research was not done then that is on the buyer. DVC is NOT the only timeshare that restricts some benefits of secondary market buyers. It is standard in the industry.