I don't know how you guys managed to get it work. I never heard about DLC booster pass before. I had v1 MK8 and working. I just installed v2.0.0 months ago and it worked for 2 new cups without that "pass"...
Now i installed v2.1.0 and this v65536 DLC pass and all new cups were'nt working...
Cruisn on the Wii is one of my personal examples of that, it's considered one of the worst games of all time, I loved it and completed it several times.