I don't know ... but just to help shape the question, are you thinking to upgrade to the
Disneyland Premium, WDW/DLR Premier, or another pass type?
FWIW, local (SoCal) wisdom says, "Blockout days exist for a reason. You really don't wanna visit on days! The crowds -- oy!! Why did we bother!?!"
EDITED for additional disclosure: My DH and I hold the 'SoCal Annual Passport' which falls below both the Premium and Deluxe but above the SoCal Select. We have lots of blockout dates.