Because first I had to go on Blue's website, see that I couldn't just check a box for CB addon, chat to a Blue rep, talk twice on the phone, drive to Blue, walk to Blue customer service at lower lot, stand in long line, receive envelope containing CB voucher, drive to CB, park in front of CB customer service, be told car couldn't stay here, move car to temporary lot, walk to CB customer service carrying voucher, stand in line, read & sign a bunch of waivers on iPad, click OK on iPad, receive CB parking pass, ask where to park, ask if I get First Tr@x, be informed I just use my Blue RFID pass anyway, walk back to car with CB parking pass in hand, etc.
If only I could log on Blue website and click button to add CB, I would have had the time to ski at CB.