It might be that you joined a PRO battle without supplies

The developers haven't announced an official date for the release. Just try to follow the news

As for your first question, this topic on the forum shows you all of the possible places the Goldbox could be dropped: http://en.tankiforum.com/index.php?showtopic=234421&p=4124215

As for your second question, I'm not quite sure what you meant