Actually, that free contest ended at midnight on December 31st. They didn't send any of the Prizes (DRM packs) until yesterday afternoon on January 1st. It's highly unlikely that "the type" of pack has any bearing on what's happening with the servers.
The first major malfunction happened late on December 31st, when the contest was still going. Events (tournaments) went completely offline, with a button that said "visit the forums." A couple hours later, a popup appeared, saying that the game would be offline for maintenance in 10 minutes, then 5. Tournaments were fixed shortly after that.
Servers started behaving erratically early yesterday (Jan 1st).
Still those contest prizes had not been sent out.
What's happening has to do with the servers at AWS (Amazon Web Services), and not some booster pack giveaway. It appears that the USA servers (and other places) are working correctly, and when you play others from there, everything works normally. Other locations seem to be stalling. It's been a problem with both the VS Ladder and Events, but only when you play certain people.
** Fingers crossed for a quick fix.
Edited by RobRatt, 03 January 2019 - 01:00 AM.