You do have to pick a winner for the NBA Playoff Challenge.
I did receive mine from the last promotion so they do come.
Promotion valid until supplies are exhausted. Winning entries will be fulfilled via United States Postal Service (USPS) within 2-4 weeks of playoff conclusion and confirmation with tracking details, when available, will be forwarded via email. Only one entry per person, household or address. Duplicate or fraudulent requests will be ignored. This promotion is limited to addresses in the United States, US Territories, APO, FPO, DPO, and Puerto Rico.